Amass debts for chicken enclosure at university (5)
I believe the answer is:
runup
'amass debts' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.
'chicken enclosure at university' is the wordplay.
'chicken enclosure' becomes 'run' (I've seen this before).
'at university' becomes 'up' ('up' can mean studying at university).
'run'+'up'='RUNUP'
'for' acts as a link.
Can you help me to learn more?
(Another definition for runup that I've seen is " Having hoisted".)