Settling a debt is a common financial transaction that involves paying off an amount of money that is owed. The crossword solutions for the term 'settled a debt' are 'PAID' (4 letters), 'REPAID' (6 letters), and 'paidup' (6 letters). 'PAID' is the act of giving money in exchange for goods or services, while 'REPAID' is the act of returning money that was previously given. 'Paidup' is a term used to describe a debt that has been fully PAID off.