Supplies argument for things of great beauty (10)

I believe the answer is:

provisions

'supplies' is the definition.
('provision' can be a synonym of 'supply')

'argument for things of great beauty' is the wordplay.
'argument' becomes 'pro' (pro is a kind of argument).
'for' means one lot of letters go next to another.
'things of great beauty' becomes 'visions' (a beautiful person might be called a vision).
'pro'+'visions'='PROVISIONS'

(Another definition for provisions that I've seen is " food".)

Want a hint initially instead of a full solution? Install my app