Standard Kent lawyer twirled in processions (7)
I believe the answer is:
parades
'processions' is the definition.
(parade is a kind of procession)
'standard kent lawyer twirled' is the wordplay.
'standard' becomes 'par' (standard of play in golf).
'kent' becomes 'se' (Kent is part of the South East of England).
'lawyer' becomes 'da' (abbreviation for District Attorney).
'twirled' shows that the letters should be reversed in order (I've seen 'twirling' mean this).
'se'+'da'='seda'
'seda' back-to-front is 'ades'.
'par'+'ades'='PARADES'
'in' is the link.
(Other definitions for parades that I've seen before include "Displays" , "Cavalcades" .)