Definition from Wiktionary, the free dictionary
clear one's lines
- (sports, idiomatic) To clear the ball away from a dangerous position.
2012 April 9, Mandeep Sanghera, “Tottenham 1 - 2 Norwich”, BBC Sport:
- The Canaries went ahead when the home defence failed to clear their lines and Pilkington was on hand to slide in his eighth goal of the campaign.