Vacancy in M & S filled by chap ultimately needing money (9)
I believe the answer is:
emptiness
'vacancy' is the definition.
('emptiness' can be a synonym of 'vacancy')
'm s filled by chap ultimately needing money' is the wordplay.
I cannot really see how this works, but
'm' is within the answer.
's' is within the answer.
'money' could be 'tin' (I've seen this before) and 'tin' is found within the answer.
This may be the basis of clue (or it may be nonsense).
'in' is the link.
Can you help me to learn more?
(Other definitions for emptiness that I've seen before include "Void; hunger" , "Void state" , "Lack of substance" , "Vacuity" , "vacuum" .)