Its blades cut blades (5)

I believe the answer is:

mower

But I can't explain it at all!

(Other definitions for mower that I've seen before include "Machine for cutting grass" , "Gardening machine" , "Tool for cutting grass" , "Grass-cutter" , "Patrick _; Rodney Blackstock in Emmerdale" .)

I've seen this clue in The Times.

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