Bloke, one with chainsaw? (6)

I believe the answer is:

feller

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'bloke' is the definition.
(I know that bloke can be written as feller)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for feller that I've seen before include "employed in forestry" , "Bloke - lumberjack" , "Chap informally" , "the cause of planes crashing?" , "Man casually" .)

I've seen this clue in The Times.

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