Blooming troll finally dismissed, like Erica (6)

I believe the answer is:

heathy

'like erica' is the definition.
(heath are plants of the genus Erica)

I cannot understand how the rest of the clue works.

(Other definitions for heathy that I've seen before include "abounding with shrubs" , "Moorish" , "Like moorland" .)

I've seen this clue in The Times.

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