Name occupying chair with English governing body (6)
I believe the answer is:
senate
'governing body' is the definition.
(type of governing body)
'name occupying chair with english' is the wordplay.
'name' becomes 'n' (common abbreviation e.g. on forms).
'occupying' is an insertion indicator.
'chair' becomes 'seat' (something to sit on).
'with' says to put letters next to each other.
'english' becomes 'e' (abbreviation).
'n' going within 'seat' is 'senat'.
'senat'+'e'='SENATE'
(Other definitions for senate that I've seen before include "Upper assembly of US" , "Second house of the Oireachtas" , "Legislative body" , "House where politicians" , "State assembly" .)