1) Ad lib 2) Ad-lib 3) Execute 4) Extemporize 5) Improvise 6) Improvize 7) Perform 8) Perform without preparation 9) To act in an impromptu manner 10) To improvise 11) To make or create extempore Found on https://www.crosswordclues.com/clue/extemporise
1) Ad lib 2) Ad-lib 3) Execute 4) Extemporize 5) Improvise 6) Improvize 7) Perform 8) Perform without preparation 9) To act in an impromptu manner 10) To improvise 11) To make or create extempore