Brief passage: "furry mice, mule and mare skinned outside school" (15)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

EXTRAC t (short passage taken from a text) excluding the final letter T (brief) + URR ( letters remaining in f URR y when the outer letters are removed ) + similar treatment of m IC e , m UL e and m AR e to generate IC + UL + AR