Undergarment seen in strip? (4)
I believe the answer is:
slip
I believe this is a double definition.
'undergarment' is the first definition.
(slip is a kind of undergarment)
'strip?' is the second definition.
('slip' can be a synonym of 'strip')
'seen in' acts as a link.
(Other definitions for slip that I've seen before include "He should take his chances" , "printer's proof" , "Nod" , "Man in field" , "Faulty" .)