"The Harlequin's Carnival" painter (4)
I believe the answer is:
miro
'the harlequin's carnival painter' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for miro that I've seen before include "He painted" , "Joan --, Spanish artist" , "Catalan artist" , "Joan -, twentieth century Spanish surrealist painter" .)