Crossword Genius

Part of meal presented using salver, say (6)

Ross

I believe the answer is:

entree

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'part of meal' is the definition.
(I've seen this before)

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for entree that I've seen before include "Access - course at meal" , "Dish allowing one to go in?" , "Dish conferring right of access" , "Dish served between fish and meat course" , "Principal dish of a meal" .)

I've seen this clue in The Mirror.
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