Horticulturist garnered different crop

I believe the answer is:

gardener

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'horticulturist' is the definition.
(gardener is a kind of horticulturist)

'garnered different crop' is the wordplay.
'garnered' anagrams to 'GARDENER'.
But, I'm not sure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for gardener that I've seen before include "he wants to cultivate?" , "Garnered by worker on cultivated ground" , "He tends cultivated land around house" , "someone in bed" , "one working on plot?" .)

I've seen this clue in The Irish Independent.

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