According to Henri I, English revolutionary scoffed (6)
I believe the answer is:
jeered
'scoffed' is the definition.
('jeer' can be a synonym of 'scoff')
'according to henri i english revolutionary' is the wordplay.
'according to henri i' becomes 'je' ('I' in French - Henri is a common French name).
'english' becomes 'e' (abbreviation).
'revolutionary' becomes 'red' (red can informally mean communist).
'je'+'e'+'red'='JEERED'
(Other definitions for jeered that I've seen before include "Ridiculed, scorned" , "Mocked, derided" , "Ridiculed, sneered" , "Did deride" , "Barracked" .)