The Alvey Reel does not have a line clip but this simple knot works well.
Is easily tied while the reel is still on the rod.

Wind a loose coil of line over your finger and around the reel’s line
surface so the tag end comes back to your finger.
Tie a half hitch around the line that is over your finger, pull up and
the knot will tighten on the line surface.
Pull down and the knot will release.

Please do not clip the line under your release lever. This may damage the rivet causing the lever to become loose.