Chew this in meditation? (3)

I believe the answer is:

cud

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'chew' is the definition.
(thesaurus)

I don't understand the remainder of the clue.

(Other definitions for cud that I've seen before include "it's still in the cow" , "Bovines chew it" , "THIRD PART OF 23" , "Re-chewed food of a ruminant" , "Cows chew it" .)

I've seen this clue in The Sun.

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