Crossword Genius

Using oxygen to produce energy (7)

Ross

I believe the answer is:

aerobic

(Other definitions for aerobic that I've seen before include "(Of exercise) improving intake of oxygen" , "(Of exercise) increasing oxygen in blood" , "Like exercise that aids the intake of oxygen" , "Pavement edging" , "(Of exercise) improving the use of oxygen" .)

I've seen this clue in The Guardian.
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