Do up about ten on behalf of university (6)
I believe the answer is:
oxford
'university' is the definition.
(I know that Oxford is a university)
'do up about ten on behalf of' is the wordplay.
'up' is an anagram indicator (letters get chucked up).
'about' means one lot of letters goes inside another.
'ten' becomes 'X' (Roman numeral).
'on behalf of' becomes 'for' (eg speaking on behalf of or for someone else).
'do' is an anagram of 'od'.
'x'+'for'='xfor'
'od' enclosing 'xfor' is 'OXFORD'.
(Other definitions for oxford that I've seen before include "Type of low-heeled shoe" , "Ancient university town" , "British university town" , "English university town" , "University city" .)