Impreza clutch my impreza 97 turbo clutch has started to slip can i adjust the cable or arm etc thanx

will need renewed parts , can't repair siezed and broken screws etc , if the clutch is slipping and the auto adjuster has failed i'd expect needs new clutch as well , whats the mileage , service history etc ?

If it is a cable clutch operation the adjustment should be at the clutch throw out arm . If it is hydraulic the replace the clutch master cylinder as you may have a blocked compensating port in the cylinder which keeps pressure on the clutch arm and will slip the clutch

Look for an adjustable cable to put in your Jetta. They are available through the aftermarket.

If you hit the gas in gear does it slip ? if its hydrolic and low fluid it wouldnt release the clutch you didnt put the year but i would have to go with adjusted at the tranny easy if thats the case also maybe the clutch is gone and theres a chatching point soyou dont mess up the flywheel those are spendy even used it engages the tranny starts the car and most importantly ballances the engine there for removing some metal could throw the balance way off

Not easy to cut ???? Not sure what you mean by this, but imprezas are notorious for failing clutches......it is the weakest link unfortunately.....

Has the clutch been recently replaced ?????

How many miles are on the clock ???

What kind of noise are you hearing ???

It sounds like the clutch is close to being worn out as the pressure plate is not gripping the clutch plate with sufficient force when power is applied. Before you consider replacing any thing, first check the clutch free travel adjustment because as the clutch plate wears the free travel does decrease and if there is no free travel, then there will be some releasing action on the pressure plate allowing cluth plate slip. Hydraulic setups are usually self adjusting but you should check the free travel of the clutch pedal which should be about 3/8 to 1/2 inch measured at the pedal rubber. This is done by adjusting the push rod that links the pedal arm to the piston in the master cylinder. Adjust by first loosening the locknut on the rod at the end where it attaches to the pedal arm and turning the rod in either direction to obtain the correct free travel. One adjusted retighten locknut.
For a cable setup there should at least 1/8 inch of free travel of the cable before it starts to move the clutch fork on the outside of the bell housing. To adjust, hold the operating fork so that the release bearing is touching the fingers of the pressure plate. You will need to turn the cable adjuster so there is only about 1/8 to 1/4 inch of free travel of the cable where it attaches to throw out fork before it starts to move the fork when the pedal is depressed.
If all adjustments are correct and clutch is still slipping then the pressure plate diaphragm spring has lost its tension and /or the clutch plate has worn down to the rivets. Either way you will have to do a complete clutch rebuild.

THE ONLY WAY TO ADJUST YOUR CLUTCH IS TO BLEED THE FLUID AFEW TIMES,,EG...FIND THE BLLED SCREW..GET SOMEONE TO PUMP THE CLUTCH A FEW TIMES,HOLD IT DOWN,RELEASE SCREW.FLUID SQUIRT OUT,,TIGHTEN SCREW.PUMP AGAIN, HOLD,RELEASE SCREW,SQUIRT ,TIGHTEN....THIS RELEASES ANY AIR IN PIPES,OR MASTER CYLINDER..IF IT DOESNT IMPROVE NEED NEW CLUTCH,THEY ARE SELF ADJUSTING, AND EVEN AFTER A FEW MONTHS IT WILL SHUDDER SLIGHTLY ANYWAY,DUE TO STRAIN.THATS IF IT IS FOUR WHEEL DRIVE,MORE IF TURBO...I HAVE ONE,WITHIN 2 MTHS,SLIGHT SHUDDER ARRIVES,THATS A EXEDDY CLUTH £360

check vacuum hose leaks

This is not the turbo it is the over-powering the clutch, it happens in 5th because that is when most worn clutches slip, it is the biggest load, replace your clutch.