结清账款：指支付欠款，使账户余额为零。
结算(settle one's account), 此释义来源于网络辞典。
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... settle for 对…感到满足，满足于 settle one's account 结算;付讫 shake off 撵走，摆脱;抖落 ...
付讫；结算
close an account / balance the books