Don't worry I didn't take it that way at all.

I guess what I mean is more like, your body passing is all about your figure right? And clothes can heavily influence your figure, up to what I would say is 90%.

For you, your body is slim and you've been on hormones long enough that your figure reads feminine. So if you're wearing clothes that fit then they're going to be shaped like your body, and then you'd pass despite not wearing traditionally femme clothes. But also a tank is absolutely a femme piece of clothing. Men's tees similarly will fit your figure if they're in your size, and so even though they're men's clothes they'd look femme on you. (and if they're bigger then they'll actually make you seem smaller, which similarly makes you pass as femme more)

For me, my figure right now is very androgynous, but I can make it appear a lot more feminine just by wearing femme clothing. Since my figure is androgynous, it doesn't really matter what femme clothing I wear since my figure will be ambiguous regardless. So wearing something femme will make me pass even if I'm wearing it in a way that doesn't accentuate femininity in my figure. This goes both ways for me right now though, if I wear masculine clothing (that isn't too big for me) I'll be read as a man. Ambiguous clothing will defer to whatever the rest of my presentation is, but if everything is ambiguous I'll be read as masc. I basically just need to avoid accentuating masculine qualities and I'm fine.

For someone with a more masculine figure, they can use clothes to hide their masculine aspects. High waist bottoms being the big example that I love and wear all the time since they make your hips look wider and waist thinner. Other examples include things which deemphasise your shoulders such as accessories that draw your eye away from them towards your chest or shirts that emphasise your arms proper. Etc... Etc... I still benefit from these so I still use these tricks a lot. Plus high waists are pretty and I love them.

So essentially, I would say that your clothes are still 90% of what make you pass not because they are feminine necessarily but rather because they don't obscure your figure's femininity when you wear them. If you wanted to not pass you could apply the tricks masc bodies need in reverse to emphasise your masculinity and look more masc again, essentially. So by not doing that, the clothes you wear are still a part of how you pass even if technically it's your body doing the work. Yes this is me twisting the meaning a bit to fit what I initially said, but I do genuinely think this is how it works.

Obviously whether a person's face passes is a whole different can of worms hence why I mentioned long hair being half of that whole affair. You need both to actually pass though.