Fees expected on Sunday (4)
I believe the answer is:
dues
'fees' is the definition.
(payments which are due)
'expected on sunday' is the wordplay.
'expected' becomes 'due' (similar in meaning).
'on' is a charade indicator (letters next to each other).
'sunday' becomes 's'.
'due'+'s'='DUES'
(Other definitions for dues that I've seen before include "subs" , "Subscription to a club or society" , "Membership fees" , "Payments made for upkeep of church" .)