1. A-one

1. crack, first-rate, super, tiptop, topnotch, tops, superior, one
2. 1, I, single, unity, digit, figure, playing card
3. adept
4. champion, sensation, maven, mavin, virtuoso, genius, hotshot, star, superstar, whiz, whizz, wizard, wiz, expert, Allied Command Europe
5. ACE, headquarters, serve

1. service, breeze through
2. pass with flying colors, sweep through, sail through, nail, pass, make it, score
3. hit, tally, rack up, play
4. serve