Crazy, Daft, Wacky, Like Wearing Zany Headgear
Puzzle 6 of The 1950s Hard Pack
Question is: Crazy, Daft, Wacky, Like Wearing Zany Headgear
and the answer is: MADCAP
Word Meaning:
MADCAP — A person who acts in a capricious, impulsive, or reckless manner.
Definitions from Wiktionary.