ETYM Old Eng. clewe, clowe, clue, AS. cleowen, cliwen, clywe ball of thread.
(Homonym: clue).
A ball of yarn or cord or thread.
Corner of sail with hole to attach ropes.
Corner of sail to which ropes are attached.

1. To roll into a ball
2. Clue
3. To haul (a sail) up or down by ropes through the clews