Style of plain title girl received (6)
I believe the answer is:
manner
'style' is the definition.
('manner' can be a synonym of 'style')
'plain title girl received' is the wordplay.
'plain title' becomes 'mr'.
'girl' becomes 'anne' (I've seen this before**).
'received' is an insertion indicator.
'mr' enclosing 'anne' is 'MANNER'.
'of' is the link.
(Other definitions for manner that I've seen before include "Demeanour" , "Bearing - fashion" , "Bearing; style of art" , "Fashion, style" , "Deportment or method" .)