Native Mexican relative of the daisy (6)

I believe the answer is:

dahlia

(Other definitions for dahlia that I've seen before include "Showy garden flower" , "Plant of the daisy family" , "Flower from tuber" , "Aid Hal (anag) - flower with showy heads" , "Had Lia this peculiar flower?" .)

I've seen this clue in The Guardian.

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