Make damp (7)
I believe the answer is:
moisten
'make damp' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for moisten that I've seen before include "It's on me (anag)" , "water a bit" , "Add water - dampen" , "Make damp, say lips with tongue" , "Make damp or slightly wet" .)