Caress with the lips (4)
I believe the answer is:
kiss
'caress with the lips' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for kiss that I've seen before include "Cross" , "Peck, smacker, X" , "Peck (on cheek or lips?)" , "Caress with lips" , "Expression of love" .)