The initial idioms of the letter A

allow	allow free rein
allow (someone or something) in(to)	allow into a place
allow me	allow (one) free rein
allow (one) up	allow nature to take its course
allow of	allow up
allowance	allow for
allow (something) full play	alloy with
alloy	alloy (something) with
All's fair in love and war	all's well that ends well
all told	allude to
All-y all-y oxen free!	ally oneself to
all year round	alma
alma mater	almighty
almost	almost doesn't count
almost lost it	almost never