The one that money does grow on? (5,4)

I believe the answer is:

bread tree

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'grow on?' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'the one that money does' is the wordplay.
'the one that money' becomes 'bread' (bread is slang for money).
'does' becomes 'tree' (I can't justify this - if you can you should believe this answer much more).
'bread'+'tree'='BREAD-TREE'

Can you help me to learn more?

(Other definitions for bread tree that I've seen before include "Plant to see in SA" , "Woody plant" .)

I've seen this clue in the Evening Standard.

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