The term 'Hook, Line and Sinker' is an idiom that means to accept something COMPLETELY and without question. It originates from the practice of fishing, where a fisherman would use a hook, line, and sinker to catch a fish. The crossword solutions for this term are GEAR (4 letters), ALL (3 letters), WHOLE (5 letters), and COMPLETELY (10 letters). These words all relate to the idea of accepting something without question, as they all suggest a sense of completeness or totality.