Greek party on right in charge? (5)
I believe the answer is:
doric
'greek' is the definition.
(Doric is an example)
'party on right in charge?' is the wordplay.
'party' becomes 'do' (do is a kind of party).
'on' means one lot of letters go next to another.
'right' becomes 'r' (common abbreviation).
'in charge?' becomes 'ic'.
'do'+'r'+'ic'='DORIC'
(Other definitions for doric that I've seen before include "Relating to a classical order of architecture" , "Type of column" , "In a classical Greek style of architecture" , "Greek architectural order" , "Of the oldest and simplest form of architecture" .)