Crossword Genius

Item foremost of dealers trade online (6)

Ross

I believe the answer is:

detail

I'm a little stuck... Click here to teach me more about this clue!

'item' is the definition.
(synonyms)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for detail that I've seen before include "Small individual feature" , "Give full info about" , "analysts may go into" , "small military outfit" , "document?" .)

I've seen this clue in The Guardian.
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.