Damp mines to put right (7)
I believe the answer is:
moisten
'damp' is the definition.
(I've seen this before)
'mines to put right' is the wordplay.
'put right' is an anagram indicator.
'mines'+'to'='minesto'
'minesto' with letters rearranged gives 'MOISTEN'.
(Other definitions for moisten that I've seen before include "It's on me (anag)" , "Make damp or slightly wet" , "water a bit" , "Make damp, say lips with tongue" , "Add water - dampen" .)