The term 'foot the bill' is an idiom that means to PAY for something. The crossword solutions for this term are DEFRAY (6 letters), TREAT (5 letters), PAY (3 letters), and bearthecost (11 letters). DEFRAY means to provide money for a particular purpose, TREAT means to provide someone with something as a gift or reward, and PAY means to give money in exchange for goods or services. Bearthecost means to take responsibility for the cost of something.