Depending on oxygen for respiration (7)

I believe the answer is:

aerobic

(Other definitions for aerobic that I've seen before include "needing oxygen" , "Pertaining to oxygen" , "Like exercise that aids the intake of oxygen" , "Requiring free oxygen for respiration" , "Type of exercise" .)

I've seen this clue in the Sydney Morning Herald.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.