You're worrying about things that don't matter. What you're describing is essentially Warrior Diet type feeding, with low cals (next to nothing throughout the day) and a big overfeeding at night.
It's doubtful you're going to add lean mass while leaning out unless you're a) fat or b) an untrained new comer to strength training. Occasionally with certain approaches a little lean mass can be added, but it's not common.
Eat less than you burn and don't screw with your hormones and you'll lose weight/fat. Eat more and you'll gain it.
Carbs are not evil, but if you have issues with insulin management and hunger control, keep them around training and nowhere else.
Experiment, but give it time. You'll get lean if you let yourself.
And if you don't think kettleball squat cleans are difficult, I say, step up to the med-ball
- CJ Kim