Around tree, indicates sources of money (10)
I believe the answer is:
cashpoints
'sources of money' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'around tree indicates' is the wordplay.
'around' becomes 'c' (abbreviation for 'circa').
'tree' becomes 'ash' (ash is a kind of tree).
'indicates' becomes 'points' ('point' can be a synonym of 'indicate').
'c'+'ash'+'points'='CASHPOINTS'
Can you help me to learn more?
(Another definition for cashpoints that I've seen is " ATMs".)