The initial idioms of the letter A

a good egg	a good five-cent cigar
a good Jack makes a good Jill	Good men are scarce
a good many	a good Samaritan
a good scout	a good sort
a good spell	a good time was had by all
a good turn	a good value
a good voice to beg bacon	a good word for everybody
a good-for-nothing	a goody-goody
a Gordian knot	a grab bag
a grain of truth	grasp of
a grass widow	a grey area
a greasy spoon	a great deal
a great many	a grin like a Cheshire cat
a grip on	a grip on oneself
a ground ball with eyes	A growing youth has a wolf in his belly