New arts leader (4)

I believe the answer is:

tsar

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

'new arts' is the wordplay.
'new' is an anagram indicator.
'arts' is an anagram of 'TSAR'.

(Other definitions for tsar that I've seen before include "Peter the Great, for example" , "Absolute ruler" , "Despot" , "Old Russian 22" , "Old leader" .)

I've seen this clue in The Mirror.

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