Crossword Puzzle Fourth-down move

Clue: Fourth-down move

Moved downward (SLID with 4 letters)
Downward movement (DECREASE with 8 letters)
Slight downward movement (NOD with 3 letters)
Word before salts or Downs (EPSOM with 5 letters)
Checker move? (TWIST with 5 letters)
Fourth-century date (CCCLI with 5 letters)
Like some moon-based movements (TIDAL with 5 letters)
Move erratically (e.g. FLIT with 4 letters)
Puzzle that moved from the U.S. to Japan to England and back to the U.S. (SUDOKU with 6 letters)
Off-season moves (TRADES with 6 letters)