Answer:

edginess

Answer	Crossword Clue
EDGINESS	Nerves
EDGINESS	Jitters
EDGINESS	Tense feeling

EDGINESS	Tendency to push the envelope
EDGINESS	Quality that's a bit unsettling
EDGINESS	Sign of nerves
EDGINESS	Disquietude
EDGINESS	Avant-garde quality
EDGINESS	What a pacer may be experiencing