Crossword Genius

Deems possibly to be old people (5)

Ross

I believe the answer is:

medes

'be old people' is the definition.
(people of the Median Empire)

'deems possibly' is the wordplay.
'possibly' indicates an anagram.
'deems' is an anagram of 'MEDES'.

'to' is the link.

I've seen this clue in the Evening Standard.
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