For court sitting, reportedly in March? (10)
I believe the answer is:
procession
'march?' is the definition.
(a procession of people marching)
'for court sitting reportedly' is the wordplay.
'for' becomes 'pro' (as in being 'pro' something).
'court sitting' becomes 'session' (I've seen this before).
'reportedly' indicates a 'sounds like' (homophone) clue.
'session' sounds like 'cession'.
'pro'+'cession'='PROCESSION'
'in' acts as a link.
(Other definitions for procession that I've seen before include "Motorcade" , "Parade, cavalcade" .)