Identify — location (4)
I believe the answer is:
spot
This clue is a double definition.
'identify' is the first definition.
(I've seen this before)
'location' is the second definition.
(spot is a kind of location)
(Other definitions for spot that I've seen before include "Small mark; see" , "Notice - stain - pick out" , "Notice; pimple" , "Fix" , "See - blemish" .)