Crossword puzzle clue "puzzle with only one way out"

Puzzle with only one way out

French goose, which you won't find in a vowelless puzzle (I only allowed this entry in the puzzle because Rex Parker used it once - true story)

Puzzle-within-a-puzzle puzzle

Streets with only one way in or out

"I can only ___ much!" ("I'm only one person!")

You can puzzle your way out of one

Out on a limb, say (or a type of movie where only limbs pop out at you?)

"Baseball, it is said, is only a game. True. And the Grand Canyon is only a hole in ___." (George Will)