The initial idioms of the letter A

hell of a lot of	a hell of a mess
a hell of a	a helping hand
a hen night	a hidden agenda
high flier	high muckamuck
high muckety-muck	a high roller
a high-flier	a hill of beans
a hit list	a hit man
a hold on a strong	a hole card
a hole in the wall	a holy terror
a home away from home	a home from home
a home truth	a honeymoon period
honeymoon phase	honeymoon stage
a hop, skip, and a jump	hop, skip, and a jump
a hope chest	not have a hope in hell (of doing something)
a hornet's nest	a horse of another different color