Crossword Genius

Exercise to get through (5)

Ross

I believe the answer is:

drill

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'exercise' is the definition.
(synonyms)

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(Other definitions for drill that I've seen before include "Exercise by repeated practice - bore" , "practise" , "Boring thing" , "Tool; fabric; bore" , "Instruct" .)

I've seen this clue in The Globe and Mail.
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