Kat, you are yeasting, according to Probert Encyclopaedia as well as starting to ferment/foment, or otherwise Making a Wine. That's the only use I've ever known for the term. It's not that common, and I think only refers to adding the yeast to start fermentation. A Google search on the word only brought up ca 1,000 hits. A quick flick through the first 50 brought it up mainly as a Surname!

Anyway, I can see how the word appeared. The poor sod was trying to fill the blanks in something like y*a*t*n*, using a programme like Crossword Compiler, which does all sorts of clever things. Download the demo, and have a play - you'll have fun. The neat thing is you can set up your grid, provide C/C with a wordlist, then, let it go. It will come up with a 'best fit'. Go to the main 'dictionary' and you can fill the blanks. It also finds acronyms, etc. A hell of a lot easier than doing it all on a scratchpad. With software like that, the hardest part is defining the clues - which is the real art of x-word building, and methinks is why you are grumpy.

Umm... a quick punt at clues for "yeasting"....

1. "Normal" - The process of adding a dry ingedient to start
   fermentation in alcohol (or bread)

2. "Cryptic" - Drygoods that put the punch into wine, and give
   it a final 'ting'.

Awww Shucks Kat ... give us a break = post the 'cross-over' letters and 'blanks', so I can have a go at finding alternative word(s). I'd also like to see the clue that got your tits in a tangle ... ;)

Cheers - Sam