Sargent composition's weird (7)

I believe the answer is:

strange

'weird' is the definition.
(synonyms)

'sargent composition's' is the wordplay.
'composition's' is an anagram indicator (I've seen 'composition' mean this).
'sargent' is an anagram of 'STRANGE'.

(Other definitions for strange that I've seen before include "Abnormal" , "Odd, peculiar" , "Irregular" , "Unusual, surprising" , "Weird, eerie" .)

I've seen this clue in The Sun.

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