Crossword Genius

The main work of an artist? (8)

Ross

I believe the answer is:

seascape

This clue might be a double definition.

'the main work' is the first definition.
(I've seen this before)

'an artist' is the second definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.

'of' is the link.

(Other definitions for seascape that I've seen before include "Main work" , "View of ocean and sky" , "Painting, maybe a Turner" , "Marine view" , "Maritime scene" .)

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