Money man more positive after March, for the most part (9)
I believe the answer is:
treasurer
'money man' is the definition.
(someone in charge of money)
'more positive after march for the most part' is the wordplay.
I cannot really understand how this works, but
'positive' could be 'sure' (similar in meaning) and 'sure' is found in the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found within the answer.
'part' could be 'rear' (rear is a kind of part) and 'rear' is found in the remaining letters.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for treasurer that I've seen before include "Person holding purse" , "he's got the money" , "Committee member" , "Official in charge of finances" , "Financial controller" .)