Nor are minute changes to pay (12)
I believe the answer is:
remuneration
'pay' is the definition.
(I know that pay is a class)
'nor are minute changes' is the wordplay.
'changes' indicates an anagram.
'nor'+'are'+'minute'='norareminute'
'norareminute' is an anagram of 'REMUNERATION'.
'to' acts as a link.
(Other definitions for remuneration that I've seen before include "Money paid for work or a service" , "Pay - our men earn it (anag)" , "Payment - a minor tenure (anag)" , "Money as reward" .)