Notice about politician being "a bit wet" (4)
I believe the answer is:
damp
'a bit wet' is the definition.
(I've seen this before)
'notice about politician' is the wordplay.
'notice' becomes 'ad'.
'about' says the letters should be written in reverse.
'politician' becomes 'mp'.
'ad' in reverse letter order is 'da'.
'da'+'mp'='DAMP'
'being' acts as a link.
(Other definitions for damp that I've seen before include "(Slightly) wet" , "Somewhat moist" , "Moisture" , "Unenthusiastic" , "Humid" .)