Adding Clen to PCT? You don't want any fat burners, PERIOD, in PCT. The closest thing to that would maybe be some LX for cortisol control. Finish your cycle, do PCT, keep cals at maintenance to maintain gains. After PCT, slowly cut. Besides which, lose with caloric deficit and not fat burners. Diet > everything else.
Adding Clen to PCT? Well if he doesn't listen to you...then its all for naught we posted...but seriously OP listen to the MidWestHairyBeast , he has been in this for over a decade...he knows this stuff better than any of us who posted here...