Join university before half-term (5)
I believe the answer is:
unite
'join' is the definition.
(I know that join can be written as unite)
'university before half-term' is the wordplay.
'university' becomes 'uni' (short for university).
'before' is a charade indicator (letters next to each other).
'half-term' becomes 'te'.
'uni'+'te'='UNITE'
(Other definitions for unite that I've seen before include "Join together, become one" , "Group of workers" , "Come together as allies or comrades" , "old coin" , "Become an integrated whole" .)