Crossword Genius

Comparatively smart tool (7)

Ross

I believe the answer is:

trimmer

I believe this clue is a double definition.

'comparatively smart' is the first definition.
('trim' can be a synonym of 'smart')

'tool' is the second definition.
(cutting tool)

(Other definitions for trimmer that I've seen before include "Hair clipper" , "Cutter; slimmer and fitter" , "horizontal beam" , "barber" , "Comparatively slender" .)

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