Heads of campus halls worked with uni and LGBT music venue (9)
I believe the answer is:
nightclub
'music venue' is the definition.
(venue which plays music)
'heads of campus halls worked with uni and lgbt' is the wordplay.
'heads of' says to take the initial letters.
'worked with' indicates anagramming the letters.
'and' is a charade indicator (letters next to each other).
The initial letters of 'campus halls' is 'ch'.
'uni'+'lgbt'='unilgbt'
'ch' anagrammed with 'unilgbt' can make 'NIGHTCLUB'.
(Other definitions for nightclub that I've seen before include "where people dance" , "one of the high spots" , "disco" , "Where one might have room to swing" , "Place open late for entertainment, food and drink" .)