Puzzle with an exit (4)
I believe the answer is:
maze
'puzzle with an exit' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for maze that I've seen before include "A labyrinth of hedges - easy to get lost in" , "Puzzling network of paths" , "Network of hedges to get lost in" , "Puzzling path network" , "Confusing network of paths" .)