That’s now known as intermittent fasting. 16 hour fast followed by a regular lunch and dinner. You can even keep a typical caloric input, but the extended period of not eating consistently is enough to “trick” your body into going after fat stores. Front recent reading it’s equivalent to fasting two days for an entire week, but at least for me skipping breakfast is much easier. I’m not overweight by any measure, but am middle age skinny fat. Waiting until noon for my first calories has worked well to start eliminating fat from undesirable places without impacting other training.