Discussing what looks understated and attractive (which is the look I've kind of gone for my whole life) is not the thing on these boards, people will ask you why you want to look 'sexy', but the thing is- you don't have to so if you don't like that look, or think women shouldn't look sexy, or attractive in general, then that option is available. I like to look not so much sexy (which sounds overt) but attractive and by that I mean look like me, look nice in my clothes, and show off my best features rather than gain an overall aesthetic that whilst interesting, doesn't feature my body and the best bits.
So- these days, I think some overtly 'sexy' clothes look very tired and dated, Isla Fisher is a beautiful late forties woman, she went on a TV show last week wearing a push up bra and skin-tight dress with heels and it did look dated (whereas she looked fab wearing a different dress earlier in the week) so no push up bras for now, I think (good bra, holding everything in place, yes). Similarly, I think heels can look dated, especially high ones in the daytime (and I say that as someone who wore heels for 30 odd years).
I don't agree though that all the young ones look androgenous. My students are mostly wealthy and they mainly wear baggy trousers, but they fit very well around the waist/flat stomach, and wear them with a crop or tight top. It's the tight/baggy contrast that seems to be the thing. Similarly, they might wear a tight dress on a night out with trainers. They don't look the least bit androgynous with long swishy hair, beautifully made-up faces (no long eyelashes any more), toned, tanned sometimes but not always, they look great and natural. Lots of time in the gym and lots of gym clothes worn (again, not androgynous).
I have not nailed this look but I still usually go for one baggy thing, one tighter thing (so tighter top, baggier not so structured jacket). Camis still work for me, no idea if anyone else is wearing them. I like tighter jeans in winter anyway (so skinny but with give, black, not tight parsnip blue ones) which helps, but with chunky boots.
I think dressing for your shape is still key- the current fashions are the opposite of what flatter my shape (apple), but are very flattering for pears I think, so if you are a pear, you probably look more understated sexy than I do! Looking confident and glowing is always sexy.