Prestige of a revolutionary in court (6)
I believe the answer is:
cachet
'prestige' is the definition.
(synonyms)
'a revolutionary in court' is the wordplay.
'revolutionary' becomes 'Che' (Che Guevara the Marxist revolutionary).
'in' is an insertion indicator.
'court' becomes 'ct' (abbreviation used in road names).
'a'+'che'='ache'
'ache' placed into 'ct' is 'CACHET'.
'of' acts as a link.
(Other definitions for cachet that I've seen before include "(Mark of) distinction" , "Distinguishing mark or seal" , "Distinguishing feature" , "Prestige - seal of approval" , "Official seal on document" .)