A Democrat and Liberal wing it (2-3)
I believe the answer is:
ad lib
'wing it' is the definition.
(I've seen this in another clue)
'a democrat and liberal' is the wordplay.
'democrat' becomes 'd'.
'and' is a charade indicator (letters next to each other).
'liberal' becomes 'lib'.
'a'+'d'+'lib'='AD-LIB'
(Other definitions for ad lib that I've seen before include "Speak unpreparedly" , "Vamp" , "Speak impromptu, improvise" , "Depart from the text" , "Off the cuff remark" .)