Clue: Beefy chap, I stand up and cuff the two of them (3,6)
Answer: IAN BOTHAM
Explanation: Definition: Beefy
~~BOTH in I + reverse of MAN, I presume, though I can't really justify MAN=stand.~~ *Thanks to bridgesong for the correction: BOTH in reverse of MAN (chap) + I*. "Beefy" was (and I suppose still is) the nickname of the cricketer Ian Botham