Long to be in court getting kudos (6)
I believe the answer is:
cachet
'kudos' is the definition.
(I've seen this before)
'long to be in court' is the wordplay.
'long' becomes 'ache' ('ache' can be a synonym of 'long').
'to be in' is an insertion indicator.
'court' becomes 'ct'.
'ache' put into 'ct' is 'CACHET'.
'getting' acts as a link.
(Other definitions for cachet that I've seen before include "Distinguishing mark or seal" , "Seal; mark of prestige" , "French prestige or distinguishing mark" , "Official seal - prestige" , "(Mark of) distinction" .)