Straighten out, in a way, can be accomplished by using the crossword solutions of UNCOIL, unkink, and unsnarl. UNCOIL means to unwind or loosen something that is wound or coiled up, such as a rope or cable. Unkink means to remove a kink or twist from something, such as a hose or wire. Unsnarl means to untangle something that is knotted or tangled, such as a string or thread. All three of these words refer to the action of straightening something out.