Crossword Genius

A type of ant, I gather (9)

Ross

I believe the answer is:

harvester

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'a type of ant' is the definition.
(harvester ant is a type of ant)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for harvester that I've seen before include "Reaping-machine" , "Long-legged spider" , "One gathering in crops" , "Crop gatherer" , "Farm worker" .)

I've seen this clue in The Times.
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