Answer:

hairpin

Answer	Crossword Clue
HAIRPIN	U-shaped
HAIRPIN	Lock clip
HAIRPIN	Kind of turn

HAIRPIN	Bun holder
HAIRPIN	Chignon affixer
HAIRPIN	It's sometimes invisible.
HAIRPIN	Predecessor of the bobbypin.
HAIRPIN	Tress holder.
HAIRPIN	Designating a sharp turn.
HAIRPIN	Sharp turn.
HAIRPIN	Sharp turn on a road

HAIRPIN	Tight turn
HAIRPIN	Kind of curve
HAIRPIN	Turn type
HAIRPIN	Extremely sharp
HAIRPIN	Headdress holder
HAIRPIN	Sharp, as a turn
HAIRPIN	Very sharp turn
HAIRPIN	Switchback

HAIRPIN	Support for an updo
HAIRPIN	Like some turns

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.