I actually found it pretty sad that he'd want to rake over things again - it's 3+years ago, but he doesn't seem able to move on. I would have thought much more of him if he'd just answered the question by saying "it's all in the past - let's look forward to the game".
I did wonder if it's his dad's influence rubbing off - the difference being that Clough Snr could say controversial things and get away with it because he was a genius - Clough Jnr isn't in the same league...