Crossword Genius

Bore with exercise (5)

Ross

I believe the answer is:

drill

I believe this is a double definition.

'bore' is the first definition.
(bore can mean to drill into something)

'exercise' is the second definition.
(military exercise)

'with' acts as a link.

(Other definitions for drill that I've seen before include "Stout cotton cloth" , "Seed machine; baboon" , "Exercise by repeated practice - bore" , "Dental assistant" , "strong twilled cotton" .)

I've seen this clue in The Mirror.
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