Aromatic root claimed to have tonic or aphrodisiac effects (7)

I believe the answer is:

ginseng

(Other definitions for ginseng that I've seen before include "Plant tuber credited with tonic properties" , "Asian plant" , "Tuber with tonic effect" , "Restorative root" , "Medicinal tonic root" .)

I've seen this clue in The Guardian.

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