Tropical root (4)

I believe the answer is:

taro

'tropical root' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for taro that I've seen before include "Fortune-telling cards" , "Chinese eddo" , "Root to eat" , "A rot turns the lily-like plant" , "Starchy food" .)

I've seen this clue in the Universal and the Penny Press.

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