One such as Arp or Man Ray (7)

I believe the answer is:

dadaist

(Other definitions for dadaist that I've seen before include "unconventional painter" , "Absurdist artist" , "Member of nihilistic art movement of early 20th century" , "What Man Ray was" , "Artist favouring irreverence and incongruity" .)

I've seen this clue in The Times and The Sunday Times.

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