[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".

[MF] Too direct a clue there, Martha ! ;-)
Quick joky one : çontrol mechanism (6,6)

BTW, there is a definition for "Bust down reason" - it's not just a device. I can't tell if there is for "Case bust", which could just mean something that encases a bust ie. "Playtex Brassiere", which is wrong.

[MF] No. Slightly more amusing in a schoolboy humour sort of way.

[Blob] I think brassière would be clued as "Bust up reason (9)". [MF] "Case bust" wasn't meant to be a clue.

And the (7,9)??

[MF]Just an allusion to the clues I was commenting on. But if you can find a solution anyway, don't let me stop you! Am I anywhere on the right lines with my solution to "Bust down reason"?

Yes.

Down Reason should be given away by CdM, but as for my "O", the first letter is L.

CdM] does the answer begin with 'S'?

[Raak] You're nowhere near with "lactating".

[MF] Is it Love letter ?

[Bb] That's the most convincing one I've seen so far. I think I understand the bust clue, but that doesn't bring me any nearer to solving it!