Old tales re-edited (5)

I believe the answer is:

stale

I'm a little stuck... Click here to teach me more about this clue!

'old' is the definition.
(associated in meaning)

'tales re-edited' is the wordplay.
'tales' anagrams to 'STALE'.
Though, I'm not sure how this is indicated.

Can you help me to learn more?

(Other definitions for stale that I've seen before include "No longer fresh" , "past the sell-by date" , "Least (anag.)" , "Musty - out of date" , "Not fresh, being least" .)

I've seen this clue in the Evening Standard.

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