Starters of antipasto under grainy dish served around large atrium (7)

I believe the answer is:

auricle

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

'atrium' is the definition.
(auricle is a kind of atrium)

I don't understand the remainder of the clue.

(Other definitions for auricle that I've seen before include "Technical name for the external ear" , "External part of the ear" , "Something of a heart" , "atrium" , "place in one's heart" .)

I've seen this clue in the Irish Times and the Irish Times (Crosaire).

Want a hint initially instead of a full solution? Install my app