Where I live there are quite a lot obvious/candidate crossdressers. Nobody worries about them, but they just don't dress like the other women.
They tend to wear seamed stockings, short skirts, heels and lots of makeup. The other women are generally in ripped jeans and trainers or sandals.
The interesting thing is that in hot weather, all types tend to display lots of bust & visible brassieres. The normal women are careless about their bras, with clashing colours, frumpy styles, dropped straps and bands which ride up.
As somebody who needs to wear a bra full time, I can tell who has been properly fitted, who has selected their bra colour & style and their matching top.
All I can say is that my TG sisters are generally fully busted & firmly brassiered!