Answer:

mustard

Answer	Crossword Clue
MUSTARD	Frank topper
MUSTARD	Covering for a dog
MUSTARD	Lunch, part 4

MUSTARD	Seasoning symbolizing ability to deal with unpleasantness
MUSTARD	Deli freebie
MUSTARD	Pungent plant
MUSTARD	Pungent powder
MUSTARD	French's product
MUSTARD	Reddish yellow.
MUSTARD	Condiment.
MUSTARD	Dark yellow.

MUSTARD	Hot-dog topping
MUSTARD	Hot-dog spread
MUSTARD	Colonel on the board
MUSTARD	Kind of gas
MUSTARD	40A-34D topping
MUSTARD	Yellow squirt?
MUSTARD	Colonel suspected of murder
MUSTARD	Condiment at Nathan's

MUSTARD	Sandwich spread
MUSTARD	Leaves eaten as cooked greens
MUSTARD	Certain spread
MUSTARD	Common condiment
MUSTARD	Frank request