Extemporise (2-3)
'extemporise' is the definition.
(I know that extemporise can be written as ad-lib)
This is the entire clue.
(Other definitions for ad-lib that I've seen before include "Improvise" , "Off-the-cuff remark" , "Speak without preparation" , "without restraint" , "Unprepared remark" .)
'extemporise' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for improvise that I've seen before include "Act without previous planning" , "Create without preparation" , "wing it" , "Ad-lib" , "ad lib" .)