Check out creepily (4)
I believe the answer is:
ogle
'check out creepily' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ogle that I've seen before include "Look with desire" , "Look at with amorous intentions" , "Make eyes at" , "Look flirtatiously at" , "Stare at lecherously" .)