University teacher or patron (5)

I believe the answer is:

donor

'patron' is the definition.
(thesaurus)

'university teacher or' is the wordplay.
'university teacher' becomes 'don' (I've seen this before).
'don'+'or'='DONOR'

(Other definitions for donor that I've seen before include "Organ giver?" , "One giving something" , "patron" , "One who dishes out" , "Charitable giver" .)

I've seen this clue in The Guardian and The Telegraph.

Want a hint initially instead of a full solution? Install my app