Genus of succulent plants, native to Africa (4)

I believe the answer is:

aloe

(Other definitions for aloe that I've seen before include "Bitter drug from a leaf juice" , ". . . . vera, soothing plant" , "Genus of bitter herbs" , "Bitter fruit" , "Succulent plant (may be bitter!)" .)

I've seen this clue in The Guardian.

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