Crossword Genius

Mural painting (6)

Ross

I believe the answer is:

fresco

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

This is the entire clue.

(Other definitions for fresco that I've seen before include "Painting done in wet plaster" , "Mode of wall painting" , "Painting using watercolours on plaster" , "Watercolour done on wet plaster" , "Wall-painting" .)

I've seen this clue in The Telegraph and The Guardian.
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