"It's a clew," he said, but he spoke slowly and thoughtfully.
The count had no clew to the cause of his sudden return to Brittany.
I have followed up every sort of clew I have transferred a dozen men.
The victim had escaped, and the miser had obtained no clew to the lost treasure.
The only clew we have to the identification of the missing money were two boxes of Mexican doubloons.
But the baroness had not the clew we have; and what a difference that makes!
He has grasped his clew; and, following it, presses bravely on.
Every labyrinth has its clew, but the fugitive walks safely in a crowd.
Was the clew to the mysterious disappearance of the writing to be found here?
When you allowed me to take that letter you furnished me with my first clew.
"ball of thread or yarn," northern English and Scottish relic of Old English cliewen "sphere, ball, skein, ball of thread or yarn," probably from West Germanic *kleuwin (cf. Old Saxon cleuwin, Dutch kluwen), from Proto-Germanic *kliwjo-, from PIE *gleu- "gather into a mass, conglomerate" (see clay).