Best one to trade with (5)

I believe the answer is:

ideal

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

'best' is the definition.
('ideal' can be similar in meaning to 'best')

'one to trade with' is the wordplay.
'one' becomes 'i' (Roman numeral).
'to' is a charade indicator (letters next to each other).
'trade with' becomes 'deal' ('deal' can be a synonym of 'trade'. I am not sure about the 'with' bit.).
'i'+'deal'='IDEAL'

Can you help me to learn more?

(Other definitions for ideal that I've seen before include "Model of perfection" , "Something that one hopes to attain" , "superb specimen" , "Best possible" , "without flaws" .)

I've seen this clue in the Evening Standard.

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.