A place you might get lost in? Wow! (5)
I believe the answer is:
amaze
'wow' is the definition.
(I've seen this in another clue)
'a place you might get lost in?' is the wordplay.
'place you might get lost in?' becomes 'maze' (mazes are designed to confuse you).
'a'+'maze'='AMAZE'
(Other definitions for amaze that I've seen before include "Confound with wonder" , "Stagger" , "Greatly surprise, astound" , "Flabbergast" , "wow!" .)