The initial idioms of the letter A

about to	about to (do something)
about to do	about-face
about-turn	above
above all	above all (else)
above and beyond	above and beyond the call of duty
above average	above bend
above board	above (one's) head
above (one's) bend	above (one's) pay grade
above (one's) huckleberry	above (one's) paycheck
above par	above reproach
above suspicion	above the curve
above the fray	above the law
above the salt	above water
aboveboard	Abraham
Abraham's bosom	sham Abram