The crossword solution for the term 'LONG BOUT' is 'SIEGE, ' which is a five-letter word. A SIEGE is a military tactic in which an attacking force surrounds a defended location in order to isolate it and force its surrender. Historically, sieges have been used to capture cities, castles, and other fortified locations. They can last for days, weeks, or even months, depending on the strength of the defending forces and the resources available to the attackers.