Finance officer's rearrest arranged outside university (9)
I believe the answer is:
treasurer
'finance officer's' is the definition.
(I've seen this before)
'rearrest arranged outside university' is the wordplay.
'arranged' indicates an anagram (letters rearranged).
'outside' indicates putting letters inside (some letters go outside others).
'university' becomes 'U' (abbreviation for university).
'rearrest' is an anagram of 'treasrer'.
'treasrer' going around 'u' is 'TREASURER'.
(Other definitions for treasurer that I've seen before include "Finance officer" , "Financial assets manager" , "Fiscal officer" , "Person holding purse" , "He handles the money for an organisation" .)