Painter (grand), returned a casual greeting (4)

I believe the answer is:

goya

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

'grand returned a casual greeting' is the wordplay.
'grand' becomes 'g' (G is short for ground as in a thousand).
'returned' is a reversal indicator.
'casual greeting' becomes 'yo' (I am not sure about the 'casual' bit.).
'a'+'yo'='ayo'
'ayo' reversed gives 'oya'.
'g'+'oya'='GOYA'

Can you help me to learn more?

(Other definitions for goya that I've seen before include "Artist, died at Bordeaux, 1828" , "Great Spanish painter who depicted horrors of war" , "Span. C18 court painter" , "his etchings?" , "Portrait painter" .)

I've seen this clue in The Everyman puzzle in The Observer.

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