I just got a tape unstuck myself. Everytime I would hit eject it would make a clicking noise.
Here is what I did:
First I watched these videos to remove the radio.
Then I unscrewed the bottom panel of the radio.
Unscrew the brass screws holding in the cassette player portion of the radio.
Now flip the cassette player over to see your tape, etc.
When I pressed the eject button, I noticed a little motor with a worm gear would move a a gear which moved several other gears until it eventually moved a black gear which has a little post that moves the metal arm which moves back when pushing in a tape and moves forward when ejecting a tape. But I would get a clicking sound which seemed to be due to one gear trying to move a stuck gear.
I forgot the exact details of how I managed to get the tape out, but when I did get it out I noticed when I turned on the radio, it would act like it was trying to play a tape. But when it found out it couldn't, it would try to eject but would fail once again with the gear clicking sound.
I think I tried moving the black post on the black gear that moves the arm that pushes the tape out. Eventually I got to the point where the arm was pushed forward like it should be when a tape is ejected. At that point I was able to insert and eject a tape without any problems.