Crossword Genius

Do soldiers find it boring? (5)

Ross

I believe the answer is:

drill

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'boring?' is the definition.
(I've seen this before)

I can't explain the remainder of the clue.

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(Other definitions for drill that I've seen before include "Tool, instruction" , "Monkey" , "Boring machine" , "Hole-making tool" , "Twilled cotton; soldiers' exercise" .)

I've seen this clue in the Evening Standard.
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