if you're already at a healthy weight then you may need to pick what you want more: a certain shape or a number on the scale. for me, at maintenance, i need to gain ten pounds to drop an inch around my waist. because if you're already at a healthy and balanced place, replacing some fat with muscle is what's going to make a difference to your shape. and though you become physically smaller, the number on the scale can go up when you do that. and that's more of an exercise thing than a diet thing. the other nice thing about having more muscle and working out more is that you do get to eat more, so having ice cream sometimes is entirely doable.
in a sense, clean eating has nothing to do with weightloss. it's kind of the same effect that wearing a blue shirt has on your loss. now, all of your workout shirts could be blue shirts or blue could be your best color and you happen to have a lot of blue shirts so that you are losing weight and wearing blue a lot, but it's not quite directly connected. it's great that it has worked for you up to this point, but you need to decide what's best from here on out. i am someone who craves something, even something that i don't really like, the minute i put it off limits. so for me anything that prohibits ice cream is out. i eat less ice cream when i am allowed to have it rather than when i am not allowed to have it. i'll want it more and go out of my way to get it because i am not supposed to have it. other people find that the longer they cut something out and resist the better off they are. it's all about which camp you think you fall into. if not having ice cream ever again doesn't sound ideal or sustainable to you, then finding a way to work it in should be step one. and if you think that iifym is a way that you can eat mostly clean like you have been enjoying but with the added bonus of letting you work in things like ice cream, then try it. the nice thing about diet is that committing to one day/week/month of something doesn't obligate you to continue [kind of like if you choose to go to law school, complete law school, you probably want to be a lawyer. going to law school isn't necessarily the best route to become a concert cellist and is likely an expensive detour to that path]. if your iifym doesn't work any better than clean eating, go back to the clean. if it works better because you can incorporate a lot of clean eating but with the not clean things that you missed, do that. the thing is that you won't know what works for you until you try it because your body and tastes and preferences are a little different from everyone else's. and the best plan for you is the one that you find the easiest and most satisfying. so if you're not totally satisfied with clean, try the iifym and see what results.
-google first. ask questions later.