The term 'BIG TUG' can be broken down into two crossword solutions: YANK (4 letters) and BIG (3 letters). YANK is a verb meaning to pull or draw with a sudden movement, often with a lot of force. It is commonly used when referring to tugging on something with a rope or chain. BIG is an adjective meaning large in size, amount, or degree. Together, the term 'BIG TUG' can be interpreted as a powerful act of pulling or drawing something with a lot of force.