Medicinal plant from back yard (6)

I believe the answer is:

betony

'medicinal plant' is the definition.
(I've seen this before)

'back yard' is the wordplay.
'back' becomes 'beton' (to bet on something is to support or back it).
'yard' becomes 'y'.
'beton'+'y'='BETONY'

'from' acts as a link.

(Another definition for betony that I've seen is " medicinal plant".)

I've seen this clue in The Guardian.

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