The term 'pirate flag' can refer to a few different flags. The crossword solutions for this term are 'Roger' (5 letters), 'BLACKJACK' (9 letters), and 'Jollyroger' (10 letters). Roger is a common name for a pirate flag, which is usually a plain black flag with a white skull and crossbones. BLACKJACK is another name for the same type of flag, while Jollyroger is a more specific name for the pirate flag that includes a red bandana around the skull and crossbones.