leave the field open for someone idiom
(UK also leave the field clear for sb)为…的成功扫除障碍;为…的胜利让路
to stop competing with someone, making it possible for them to succeed
John decided not to apply for the job, which left the field open for Emma. 约翰决定不申请这份工作，这为埃玛扫清了障碍。