Attorney finds politician wet (4)
I believe the answer is:
'wet' is the definition.
(I know that damp is a type of wet)
'attorney finds politician' is the wordplay.
'attorney' becomes 'DA' (district attorney).
'finds' means one lot of letters go next to another.
'politician' becomes 'MP' (Member of Parliament).
(Other definitions for damp that I've seen before include "Clammy" , "(Slightly) wet" , "Moist air" , "Moisture" , "Somewhat moist" .)