Crossword Genius

Continually, Mafia boss supports man who made withdrawal (2,3,2)

Ross

I believe the answer is:

on and on

I'm a little stuck... Click here to teach me more about this clue!

'continually' is the definition.
(I've seen this before)

'mafia boss supports man who made withdrawal' is the wordplay.
I cannot really understand how this works, but
'man' could be 'don' (Don is an example) and 'don' is located in the answer.
The remaining letters 'onan' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for on and on that I've seen before include "Unceasingly" , "Ever" , "Continuing or continually" , "Endlessly" , "continuously" .)

I've seen this clue in The Independent.
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