Lamb infused with a singular flavour in British region (4,6)

I believe the answer is:

east anglia

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'british region' is the definition.
'east anglia' can be an answer for 'region' (I've seen this before). I am unsure of the 'british' bit.

'lamb infused with a singular flavour' is the wordplay.
'lamb' becomes 'elia' (pseudonym of essayist Charles Lamb).
'infused with' is an insertion indicator.
'singular' becomes 's' (abbreviation sometimes used in dictionaries).
'flavour' becomes 'tang' (synonyms).
'a'+'s'+'tang'='astang'
'elia' placed around 'astang' is 'EAST ANGLIA'.

'in' is the link.

Can you help me to learn more?

(Other definitions for east anglia that I've seen before include "UK region" , "old kingdom - with 25a" , "Norfolk, Suffolk, part of Essex and Cambridgeshire" , "Region of England" , "Steal again (anag.)" .)

I've seen this clue in The Telegraph.

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