Crossword Genius

Form of art devoured by spry elderly setter? (5,4)

Ross

I believe the answer is:

still life

'form of art' is the definition.
(type of picture)

I can't explain the rest of the clue.

(Other definitions for still life that I've seen before include "Painting of inanimate things like fruit or flowers" , "Painting of inanimate objects like fruit and flowers" , "Painting of flowers, fruit, etc" , "rt-form" , "Painting of a bowl of fruit, perhaps?" .)

I've seen this clue in The Guardian.
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