The sailor did not know what to do.
To furl the sail he needed a clew,
And where to find it he had no clue.
And just because Chris-who-is-posting-these didn't really get this one, here's a definition for you:
From the Free Online Dictionary
clew 1 (kl
)
n.
1. A ball of yarn or thread.
2. Greek Mythology The ball of thread used by Theseus to find his way out of the labyrinth.
3. clews The cords by which a hammock is suspended.
4. also
clue Nautical
a. One of the two lower corners of a square sail.
b. The lower aft corner of a fore-and-aft sail.
c. A metal loop attached to the lower corner of a sail.
tr.v. clewed,
clew·ing,
clews
1. To roll or coil into a ball.
2. also clue Nautical To raise the lower corners of (a square sail) by means of clew lines. Used with up.
[Middle English clewe, from Old English cliwen.]