Backed party about vote favouring university (6)
I believe the answer is:
oxford
'university' is the definition.
(Oxford is an example)
'backed party about vote favouring' is the wordplay.
'backed' is a reversal indicator.
'party' becomes 'do' (do is a kind of party).
'about' indicates putting letters inside.
'vote' becomes 'x' (how votes are marked).
'favouring' becomes 'for' (I've seen this before).
'do' reversed gives 'od'.
'x'+'for'='xfor'
'od' enclosing 'xfor' is 'OXFORD'.
(Other definitions for oxford that I've seen before include "English university town" , "Ancient university town" , "- Blue; - bags" , "Dark blue university?" , "Crossroads in central London" .)