FORT WORTH, Texas — For awhile it seemed like TCU wouldn’t be able to climb out of a 24-7 deficit, but with persistence on defense and creativity on offense the Horned Frogs battled back to push No. 8 Oklahoma State to overtime. The teams went back and forth until the second overtime as Kendre Miller rumbled in from two yards to lift TCU to a 43-40 win. For long stretches of the afternoon it appeared TCU would be lucky to keep it close, but the Horned Frogs kept making plays and capitalized on the inability of the Cowboys offense to put them away. How TCU pulled off the dramatic comeback: TCU’…