Crossword puzzle clue "time of annual madness or a hint to four squares in this puzzle"

Time of annual madness ... or a hint to four squares in this puzzle

Winter driving hazard ... or a literal hint to four squares in this puzzle

TV adjuncts ... or a hint to four squares in this puzzle

Diagonally ... or a hint to four of this puzzle's squares

They involve mixed feelings ... or a hint to four squares in this completed puzzle

Hint to filling in four squares in this puzzle

Annual solving competition held in Brooklyn, briefly ... and a hint to nine squares in this grid

Mark that appears four times in this puzzle (hint: the baseball player who's the answer to this puzzle uses one, too)