Farm worker to innovatively research decarbonisation (7)

I believe the answer is:

shearer

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'farm' is the definition.
Both the answer and definition are singular nouns.
Perhaps you can see an association between them that I don't see?

I can't explain the remainder of the clue.

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(Other definitions for shearer that I've seen before include "one who removes coat" , "He cuts the fleece from sheep" , "Sheep barber?" , "Wool cutter - ex-England footballer" , "Alan - - , Newcastle striker" .)

I've seen this clue in the Sydney Morning Herald.

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