An old saw (5)

I believe the answer is:

adage

'an old saw' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for adage that I've seen before include "Short statement expressing a general truth" , "Saw, proverb" , "Maxim, aphorism" , "Axiom" , "Old saying, maxim" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app