Wing it (2-3)
'wing it' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ad-lib that I've seen before include "freely" , "Off the cuff remark" , "Unprepared remark" , "Improvised remark" , "Unscripted impromptu remark" .)
'wing it' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for adlib that I've seen before include "not prepared for speech" , "wing it" .)