Rich food - complaint gets the boot (4,10)

I believe the answer is:

beef wellington

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

'rich food' is the definition.
'beef Wellington' can be an answer for 'food' (beef Wellington is a kind of food). I am not sure about the 'rich' bit.

'complaint gets the boot' is the wordplay.
'complaint' becomes 'beef' (beef can mean a complaint or objection).
'gets' says to put letters next to each other.
'the boot' becomes 'Wellington' (Wellington boots are a type of boot).
'beef'+'wellington'='BEEF WELLINGTON'

Can you help me to learn more?

(Other definitions for beef wellington that I've seen before include "Meat-in-pastry dish" , "meat dish" , "meal" , "dish - with 10a" , "Menu item" .)

I've seen this clue in The Guardian.

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