Short service collecting money for another (6)
I believe the answer is:
matins
'short service' is the definition.
'matins' can be an answer for 'service' (I've seen this before). I am not sure about the 'short' bit.
'collecting money for another' is the wordplay.
I cannot really understand how this works, but
'money' could be 'tin' (I've seen this before) and 'tin' is located in the answer.
The remaining letters 'mas' is a valid word which might be clued in a way I don't understand.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for matins that I've seen before include "Church service" , "Anglican morning service" , "Morning prayers or bird-songs" , "C of E's daily morning service" , "Isn't ma given to morning prayers?" .)