"Do not make yourself uneasy, my dear cousin, about your apparel. Lady Catherine is far from requiring that elegance of dress in us which becomes herself and daughter." Says Mr Collins to Elizabeth.

Pride and Prejudice

Chapter 29

I didn't get the sentence in bold. Please somebody explain it to me.



This is a special sense of "become":

Of an adornment, piece of clothing etc.: to look attractive on (someone).

(https://en.wiktionary.org/wiki/become )

Lady Catherine and her daughter dress elegantly. This elegance of dress becomes them (in the above sense). However, Lady Catherine does not require that same degree of elegance in us. She is "far from" requiring it.