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Venison supplier, born in Brussels, housed in Gibraltar? (7)

Ross

I believe the answer is:

roebuck

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

'venison supplier' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.

'born in brussels housed in gibraltar?' is the wordplay.
'born' becomes 'b' (abbreviation next to the year of someone's birth).
'in' indicates putting letters inside.
'brussels' becomes 'EU' (European Parliament is based in Brussels).
'housed in' indicates putting letters inside.
'gibraltar?' becomes 'rock' (I've seen this in another clue).
'b' placed within 'eu' is 'ebu'.
'ebu' placed inside 'rock' is 'ROEBUCK'.

Can you help me to learn more?

(Other definitions for roebuck that I've seen before include "reddish-brown jumper" , "Being wild" , "Type of male deer" , "does partner" , "Stag" .)

I've seen this clue in The Times.
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