Revolt suits leaders of guerrillas desperate for reform (7)
I believe the answer is:
disgust
'revolt' is the definition.
(synonyms)
'suits leaders of guerrillas desperate for reform' is the wordplay.
'leaders of' says to take the initial letters.
'for reform' indicates anagramming the letters (I've seen this in other clues).
The initial letters of 'guerrillas desperate' is 'gd'.
'suits'+'gd'='suitsgd'
'suitsgd' anagrammed gives 'DISGUST'.
(Other definitions for disgust that I've seen before include "Loathing" , "Turn off" , "contempt" , "Strong revulsion" , "Nauseate" .)