Bandit's Lair is a term used to describe a HIDEOUT or secret base of operations for criminals, particularly bandits. It is often a place where they can store their loot and plan their next heist. The term has been used in popular culture, such as in the classic western movie The Good, the Bad and the Ugly, where the BANDIT Tuco hides out in a cave. The term 'HIDEOUT' is an appropriate seven-letter solution for the crossword clue 'BANDIT's Lair'.