Obtain at university a set of clothing (3-2)
I believe the answer is:
get-up
'a set of clothing' is the definition.
(get-up can mean a costume)
'obtain at university' is the wordplay.
'obtain' becomes 'get' (synonyms).
'at university' becomes 'up' (slang term meaning at university).
'get'+'up'='GET-UP'
(Other definitions for get-up that I've seen before include "Outfit" , "Jump out of bed" , "Style of dress" , "Unusual or elaborate costume" .)