Ogler's look (4)
I believe the answer is:
leer
'ogler's look' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for leer that I've seen before include "Suggestive or sneering grin" , "Give lascivious look" , "Look lecherously" , "Give sly look" , "Gaze lasciviously at" .)