Steamy first date with a politician (4)
I believe the answer is:
damp
'steamy' is the definition.
(I've seen this in another clue)
'date with a politician' is the wordplay.
'date' becomes 'd' (common abbreviation eg in DOB, date of birth).
'with' is a charade indicator (letters next to each other).
'politician' becomes 'MP' (Member of Parliament).
'd'+'a'+'mp'='DAMP'
'first' acts as a link.
(Other definitions for damp that I've seen before include "Moisture" , "Rising -, TV sitcom" , "Slightly moist" , "A bit wet" , "Moist air" .)