Eyed up (5)
I believe the answer is:
ogled
'eyed up' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for ogled that I've seen before include "Eyed lustily" , "Looked at with amorous intentions" , "Looked at lecherously" , "regarded with desire" , "Eyed in a lascivious manner" .)