University put in shape for marketplace (5)
I believe the answer is:
forum
'marketplace' is the definition.
(forum is a kind of marketplace)
'university put in shape' is the wordplay.
'university' becomes 'u'.
'put in' indicates putting letters inside.
'shape' becomes 'form' ('form' can be a synonym of 'shape'**).
'u' inserted within 'form' is 'FORUM'.
'for' acts as a link.
(Other definitions for forum that I've seen before include "Medium for discussion" , "Place to meet people" , "Tribunal" , "Place where public discussion is held, as in ancient Rome" , "Ground for discussion" .)