Contribute to unlimited grant for artist (9)

I believe the answer is:

donatello

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

'contribute to unlimited grant' is the wordplay.
'contribute to' becomes 'donate' (I am not sure about this - if you are sure you should believe this answer much more).
'unlimited' indicates the central letters (remove the limits/outer letters).
'grant' becomes 'allow' (synonyms).
The central letters of 'allow' are 'llo'.
'donate'+'llo'='DONATELLO'

Can you help me to learn more?

(Other definitions for donatello that I've seen before include "Italian sculptor" , "Italian artist" , "Famous Florentine sculptor" , "C 15 Florentine sculptor" , "Chipper" .)

I've seen this clue in The Guardian.

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