Crossword Genius

Provide entertainment and grub without support (5)

Ross

I believe the answer is:

cater

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

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for cater that I've seen before include "provide meals" , "so put out food?" , "Supply food for parties" , "React (anag.)" , "Trace (anag.)" .)

I've seen this clue in The Sun.
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