Moving pictures detected evidence of arthritic joints (8)

I believe the answer is:

crepitus

'detected evidence of arthritic joints' is the definition.
(crepitus means a noise from arthritic joints)

'moving pictures' is the wordplay.
'moving' is an anagram indicator.
'pictures' anagrammed gives 'CREPITUS'.

(Another definition for crepitus that I've seen is " making creaking noise".)

I've seen this clue in The Guardian.

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