Revolutionary cares about a dictator (6)
I believe the answer is:
caesar
'dictator' is the definition.
(I've seen this in another clue)
'revolutionary cares about a' is the wordplay.
'revolutionary' is an anagram indicator.
'about' is an insertion indicator.
'cares' with letters rearranged gives 'caesr'.
'caesr' going around 'a' is 'CAESAR'.
(Other definitions for caesar that I've seen before include "Top man" , "See 2" , "Roman ruler" , "Old Roman emperor like Julius" , "Eg, Augustus, Julius" .)