Decorated with herbs say, his garden embellished (9)

I believe the answer is:

garnished

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'decorated' is the definition.
(garnishing is a kind of decorating)

'herbs say his garden embellished' is the wordplay.
'his garden' anagrams to 'GARNISHED'.
Though, I am not sure how this is indicated.

'with' acts as a link.

Can you help me to learn more?

(Other definitions for garnished that I've seen before include "Added parsley, perhaps" , "Decorated" .)

I've seen this clue in The Times.

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