Sanctioned by custom (4-8)

I think it could be either:

Which length description are you looking for?:

4-8

time-honoured

'sanctioned by custom' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for time-honoured that I've seen before include "Long-respected" , "Valued through longevity" , "Given respectability through age" , "Revered due to longevity" , "Long established" .)

I've seen this clue in The Mirror and The Times.

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