Sober posture turning rowdy (12)

I believe the answer is:

obstreperous

'rowdy' is the definition.
(thesaurus)

'sober posture turning' is the wordplay.
'turning' indicates an anagram.
'sober'+'posture'='soberposture'
'soberposture' with letters rearranged gives 'OBSTREPEROUS'.

(Other definitions for obstreperous that I've seen before include "Sober posture (anag) - unruly" , "Disruptive" , "Noisy, hard to control" , "Bolshie" , "Noisily aggressive" .)

I've seen this clue in The Telegraph.

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