Unsavory look (4)
I believe the answer is:
leer
'unsavory look' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for leer that I've seen before include "Look lasciviously at" , "Give lascivious look" , "Look lecherously" , "Ogle, smirk" , "Give sly look" .)