Clen worked well for me but only on some good gear so that the muscle mass is there. VERY stupid move but I actually wound up going up to 240mcg of Clen for 2 weeks straight. I would eat food and just sweat the carbs away. It was nuts. But cardio was impossible and it started to affect my workouts because I would get a headache. My bloodpressure was still safe but the headaches could not have been healthy. BTW I started at 20mcg which made me feel crazy, then I just kept adding more and more till I got to the 240mcg's. The thing about clen is that once your body adjusts to it, you have to increase it. I prefer ECA since it works right off the bat and you don't have keep increasing it. Plus it's OTC.
I think ECA and Anavar are a nice little cutting stack. T3 is good too but don't go too crazy on it since your thyroid is important and you don't want to mess that up.