Double-dealing disgraceful university union primarily upset with politics (11)
I believe the answer is:
duplicitous
'double-dealing' is the definition.
(synonyms)
'disgraceful university union primarily upset with politics' is the wordplay.
'primarily' indicates taking the first letters.
'upset with' indicates anagramming the letters.
The initial letters of 'disgraceful university union' is 'duu'.
'duu' mixed up with 'politics' gives 'DUPLICITOUS'.
(Other definitions for duplicitous that I've seen before include "Deceitful, double- dealing" , "Double-dealing" .)