Absorb work in month at university (3,2)
I believe the answer is:
mop up
'absorb' is the definition.
(mopping up is a kind of absorbing)
'work in month at university' is the wordplay.
'work' becomes 'op' (abbreviation for opus).
'in' means one lot of letters goes inside another.
'month' becomes 'm' (standard abbreviation).
'at university' becomes 'up'.
'm'+'up'='mup'
'op' inserted within 'mup' is 'MOP-UP'.
(Other definitions for mop up that I've seen before include "Deal with spillage or defeated enemy" , "Finish off a task, clean away remnants" , "take care of" , "Finish a task, clear away remnants" , "Complete final stage (of a task)" .)