A common fishing knot for securing an object (e.g. a hook, lure or clip) to a fishing line. A properly tied Clinch knot is relatively secure, but for additional security, the running end can be passed back through the final loop. This variant is called the Improved Clinch knot.
Pass the line through the ring from behind and turn the tail around the standing part.
Wrap around the standing part about 3 times.
Thread the running end through the loop from right to left.
Tighten the knot.
The Clinch knot is complete.