Fund bans new prospective union member (6)
I believe the answer is:
fiance
'prospective union member' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'fund bans new' is the wordplay.
'fund' becomes 'finance' (to finance is to provide funding).
'bans' suggests deleting specific letters.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'finance' with 'n' taken out is 'FIANCE'.
Can you help me to learn more?
(Other definitions for fiance that I've seen before include "Engaged male" , "who may be planning marriage" , "Prospective groom" , "One promised in marriage" , "One who's engaged" .)