Answer:

clews

Answer	Crossword Clue
CLEWS	Balls of yarn
CLEWS	Balls of thread.
CLEWS	Balls of tread or yarn.

CLEWS	Balls of yarn.
CLEWS	Ball of yarn.
CLEWS	Scotland Yard items
CLEWS	Square sail's lower corners
CLEWS	Yarn units
CLEWS	Hammock rigging
CLEWS	Miss Marple finds them
CLEWS	Balls of thread

Crossword

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