Deems to be disturbing to old people (5)
I believe the answer is:
medes
'old people' is the definition.
(people of the Median Empire)
'deems to be disturbing' is the wordplay.
'to be disturbing' indicates an anagram.
'deems' anagrammed gives 'MEDES'.
'to' acts as a link.
I've seen this clue in the Evening Standard.
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