suspenders?

Unfortunately, no twyngwyn.

 

Hint:

 

Your first answer focused on the wrong end!

Brassieres?  (don't ask me why - but it has the right number of letters)

lol...so did all the others

Yes, and my reasoning is the same as yours - it has the right number of letters!

Brassieres is/are not it.

 

But...

 

Remove the series and you're close to a bit!

brazenness?

Not it twyngwyn.