Cancel legislation banning a revolt (5)
I believe the answer is:
repel
'revolt' is the definition.
(synonyms)
'cancel legislation banning a' is the wordplay.
'cancel legislation' becomes 'repeal'.
'banning' indicates named letters should be taken away.
'repeal' with 'a' removed is 'REPEL'.
(Other definitions for repel that I've seen before include "Sicken" , "push off" , "Beat back; cause disgust to" , "See off" , "Drive or force back" .)