Crossword Puzzle Run gracefully

Clue: Run gracefully

Nixon running mate (AGNEW with 5 letters)
iTunes runner (MAC with 3 letters)
First National League player to pass 500 home runs (OTT with 3 letters)
Like smooth-running machines (OILED with 5 letters)
Fad runner? (CRAZEOPERATOR with 13 letters)
First ballplayer to hit 50 home runs before the end of August (ROGERMARIS with 10 letters)
Had a long-running argument (FEUDED with 6 letters)
Base-runner's ploy (STEAL with 5 letters)
Floats gracefully (WAFTS with 5 letters)
Runtish (e.g. PUNY with 4 letters)