Legislation follows rascal’s strike (6)
I believe the answer is:
impact
'strike' is the definition.
(I've seen this before)
'legislation follows rascal's' is the wordplay.
'legislation' becomes 'act' (I've seen this before).
'follows' says to put letters next to each other.
'rascal' becomes 'imp' (synonyms).
'act' put after 'imp' is 'IMPACT'.
(Other definitions for impact that I've seen before include "Forcible contact between two things" , "Result" , "Forceful striking" , "Forcible contact; marked influence" , "Force exerted by collision" .)