I'm pretty sure I know the answer to this question, but it's been on my mind. If clues are spent and round one of combat does not result in the defeat of the monster, are the extra dice included in round 2?
I've never done it. I believe the extra dice are for that round and any re-rolls only, round two not constituting a re-roll.
You are correct. Clues only help with the skill check they're spent on, so they don't carry over.