Leers at (5)
I believe the answer is:
'leers at' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ogles that I've seen before include "Leers" , "Looks longingly at" , "Casts amorous glances" , "Looks at (someone) lecherously" , "Looks at amorously, makes eyes at" .)