Triangular Flag; Wider at Hoist Than at Fly
Puzzle 5 of Hawaii Pack
Question is: Triangular Flag; Wider at Hoist Than at Fly
and the answer is: PENNON
Word Meaning:
PENNON — (chiefly historical) A long, narrow flag or streamer, often swallowtailed or triangular, usually hung at the top of a helmet or lance, originally the ensign of a knight under the rank of knight banneret, and later of a lancer regiment.
Definitions from Wiktionary.