Anglo-Irish Duke or Welsh Duke? (10)

I believe the answer is:

wellington

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'anglo-irish duke' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.

'welsh duke?' is the wordplay.
'welsh' becomes 'W' (abbreviation).
'duke?' becomes 'ellington' (I've seen this before).
'w'+'ellington'='WELLINGTON'

'or' acts as a link.

Can you help me to learn more?

(Other definitions for wellington that I've seen before include "way to serve beef tenderloin" , "Bomber" , "Former PM" , "Footwear" , "beef-dish?" .)

I've seen this clue in The Independent.

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