Rickety chair upset with jerk (8)

I believe the answer is:

rachitic

'rickety' is the definition.
(thesaurus)

'chair upset with jerk' is the wordplay.
'upset' indicates anagramming the letters.
'with' is a charade indicator (letters next to each other).
'jerk' becomes 'tic' (jerking movement by the body).
'chair' is an anagram of 'rachi'.
'rachi'+'tic'='RACHITIC'

I've seen this clue in The Guardian.

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