Perform (3)
'perform' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for enact that I've seen before include "Put into practice" , "Make (a bill) law" , "Present" , "Play one's part" , "Establish by law - perform" .)
'perform' is the definition.
(acting is a kind of performing)
This is all the clue.
(Other definitions for act that I've seen before include "Function" , "Bill successfully prosecuted" , "Routine" , "Ordinance" , "Thing done" .)