Not up to 57-Down, perhaps 3 letters

Crossword clues for Not up to 57-Down, perhaps 3 letters

Answer	Clue
LAP	Place for 57-Down, perhaps
IRR	Not up to 57-Down, perhaps
DIET	Forgo 57-Down, perhaps
GHOSTRUNNER	17-Across's role in a game of 57-Across, perhaps?
HITTHEHAY	Turn in, perhaps using items hidden in 17-, 24-, 48- and 57-Across