Knowledgeable about, with "of" (7)

I believe the answer is:

abreast

(Other definitions for abreast that I've seen before include "Side by side - in the picture" , "Alongside one another and facing the same way" , "to be up to date" , "Familiar" , "On a level together" .)

I've seen this clue in the Universal.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.