Possible Clues:

• You're stuck with a mischievous donkey, by the sound of it
• No getting out of it, I've seen better days
• I'm overtaken, clipped, creating a roadblock
• Gordius is old hat - there's no getting out of it
• Has-been's statement producing deadlock
• You can't escape from it
• Going-nowhere situation
• I am over the hill - in this situation, nothing can be done
• I get myself a ticket to enter with great difficulty
• Deadlock resulting from has-been's admission?