Did you finish your clove with two half hitches? If it was a big piece and your determined to tie a clove you should being throwing in a marl to make it easier to untie and take a little of the brunt off the clove. If your dropping wood or limbs, a Stillson hitch (Girth hitch) with two half hitches is a better knot to tie. Its easy to untie under experiencing a load, and doesn't reduce the strength of rope as much as a clove. I only tie a clove when I'm worried about a tree splitting when I'm falling it, and I don't have any ratchet straps; a Stillson (Girth) is a poor choice for this application cause of the splitting force from the inside of the knot will cause it to roll over two half hitches rendering the knot useless. Always finish your rigging hitches with two half hitches (one for your groundie, and one for his mother.). The only rigging knot that requires about 6 inches of tail is your running bowline.
Hitches will roll out unless secured. Tautline, blake, girth, clove will all unravel if not tied off or a stopper knot is put in place. Hitches that use eye-to-eye cordage doesn't need this cause both ends are secured to a beener.