Crossword Genius

Cliches etc thus translated to cover new section (9)

Ross

I believe the answer is:

chestnuts

'cliches' is the definition.
(as in an old chestnut)

I don't understand the rest of the clue.

(Other definitions for chestnuts that I've seen before include "Tree fruits called conkers - some are edible" , "often retold stories" , "horses" , "Common tree-fruits, sometimes roasted" .)

I've seen this clue in The Guardian.
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