So based on your closing statements, you don't need a diet after all (as opposed to the name of this post). You mean leaning-out phase, right?
With patience, fat loss shouldn't be too much of a problem but a drop to 7% may be hastey - especially with training alone - unless you take at least three months.
I have found that brisk 45-60 minute walks (light jog intervals) before breakfast, coupled with afternoon heavy weight sessions works well. With time, 30 minutes additional (moderate pace) t-mill walking after the weights can ramp up fat loss further. This takes advantage of your open schedule and the morning stuff doesn't add much to overtraining risk.