The term 'It's at the end of the line' can be represented by four different crossword solutions: PERIOD (6 letters), LURE (4 letters), FISHHOOK (8 letters), and FLY (3 letters). The word PERIOD is a punctuation mark used to indicate the end of a sentence or thought. LURE is an object used to attract animals, often in the form of bait. FISHHOOK is a metal hook attached to a line used for catching fish. Finally, FLY is an insect that can be used as bait when fishing. All of these words can be used to represent the phrase 'It's at the end of the line, ' as they all signify the end of something.