I had trouble with those two words. I knew that 'dragon' HAD to be correct and 'iffy' seems to be the only word that fits. Also, there's no two ways about 118A being 'cygnets.
In the end I went for 'VENT' for 106D and 'FUGUE' for 110A - at least for now, until confirmed or otherwise by someone else!
Plenty of time to alter them if wrong. I received my copy of Big on Monday and had most puzzles done by Tuesday night. Except the Starhunts which I usually leave until last and the FindaWord which I hardly ever do - they give me the irrits. I only have about 1/5th of the Goliathon to do and five StarHunts (done #1).
Won't be doing Memory Lane this month as I can't stand Rod Stewart but have completed about half of the Do It Yourself - only my second ever attempt (don't know why).
Have to win another $50 cheque or voucher so I can continue my subscription to Big for another year (adding only $20-odd)
Good luck with your entries and lets hope someone can confirm 'fugue' and/or 'vent'.