The initial idioms of the letter A

a legend in (one's) own mind	a legend in (one's) own time
A leopard can't change its spots	a leopard doesn't change its spots
a level playing field	a licence to print money
a lick and a promise	have a lick of the tar brush
a lick with the rough side of the tongue	lick-ass
a lie has no legs	a life of its own
the life of Riley	life saver
a life-saver	a lightning rod
A likely story	a line in the sand
a lingua franca	the lion's den
a liquid lunch	a list as long as arm
list as long as (one's) arm	a litmus test
a little	a little bird
A little bird told me	a little bit of bread and no cheese
a small cog in a large machine	a little from column A, a little from column B