Organise a number of games at university (3,2)
I believe the answer is:
set up
'organise' is the definition.
(I know that organise can be written as set up)
'a number of games at university' is the wordplay.
'a number of games' becomes 'set' (I've seen this before).
'at university' becomes 'up' ('up' can mean studying at university).
'set'+'up'='SET-UP'
(Other definitions for set up that I've seen before include "Organise; mount" , "Conspiracy" , "The way something is arranged" , "Arrangement; trick" , "Fool" .)