Dashed unfashionable embracing right (6)
I believe the answer is:
darted
'dashed' is the definition.
('dart' can be a synonym of 'dash')
'unfashionable embracing right' is the wordplay.
'unfashionable' becomes 'dated' ('dated' can be similar in meaning to 'unfashionable').
'embracing' means one lot of letters goes inside another.
'right' becomes 'r' (common abbreviation).
'dated' placed around 'r' is 'DARTED'.
(Other definitions for darted that I've seen before include "Sniped" , "Dashed, flitted" , "Dashed on the Dublin transport system?" , "Was fleet" , "Dashed, on the electric train?" .)