Best way to follow revolutionary argument (5)
I believe the answer is:
worst
'best' is the definition.
(thesaurus)
'way to follow revolutionary argument' is the wordplay.
'way' becomes 'st' (**).
'to follow' means one lot of letters go next to another.
'revolutionary' shows that the letters should be reversed in order.
'argument' becomes 'row' (I've seen this before).
'row' in reverse letter order is 'wor'.
'st' put after 'wor' is 'WORST'.
(Other definitions for worst that I've seen before include "Far from the best - defeat" , "Least well" , "Least competent" , "Best; least good" , "The least favorable" .)