Structure housing university meeting (5)
I believe the answer is:
forum
'meeting' is the definition.
(forum is a kind of meeting)
'structure housing university' is the wordplay.
'structure' becomes 'form' (form is a kind of structure).
'housing' means one lot of letters goes inside another.
'university' becomes 'U' (abbreviation for university).
'form' going around 'u' is 'FORUM'.
(Other definitions for forum that I've seen before include "Place to discuss ideas" , "Place to meet people" , "Place for open discussion" , "Roman meeting place" , "discussion group" .)