[rab] If it's Rufus, this must be Kelvins - if it's Enigmatist, I haven't got a chance :o) No-one's got mine yet, and I don't think the "?" helps at all. Like HIJKLMNO, there's no definition involved. As for "Bust down reason", I know this and I wouldn't've got it in a million years. At least, not without some letters.
Boolbar] I thought the same - but wouldn't the clue be in lower case, if that were the case? [MF] I'm still flummoxed by the 'O' clue but have a hunch it's more to do with numbers than letters.
The Weekend one reminds me of one we had on Cryptic Stations which was e This was Mile End - though I, like Chalky was put off by the capitalization - and was looking for a "head" or "top" answer. [MF] I thought Raak had got O - you're saying not ?
Crosswords are generally filled in in all upper case, so I think "K" is valid. For "bust down reason", would this be something to do with not wearing a bra? I can't think of a 9-letter way of expressing that though.
Boolbar - you are correct on this one. But the reason I dislike it is because (a) it's ambiguous - the answer could just as easily be bookend; (b) there's no definition, purely a device; and (c) even as a device it's flawed because it's not indicated (e.g. with the phrase "to a setter"). These "inverse clues" are becoming more prevalent, but I don't think they're big or clever.
[Raak] That is true. You can make up several answers that match some of these clues - like O (4,6) = Come second. My 'v' is much the same, but is a famous schoolboy joke.
[Bb] Centre of Gravity, ha ha. No, mine isn't the start, end or middle of anything. Or the second. Or even "a letter in the word 'open'". [Blob] I said not when I said "No-one's got mine yet".