Region where Lamb's full of a singular flavour (4,6)
I believe the answer is:
east anglia
'region' is the definition.
(region of England)
'lamb's full of a singular flavour' is the wordplay.
'lamb' becomes 'elia' (pseudonym of essayist Charles Lamb).
'full of' indicates putting letters inside.
'singular' becomes 's' (abbreviation sometimes used in dictionaries).
'flavour' becomes 'tang' (synonyms).
'a'+'s'+'tang'='astang'
'elia' placed around 'astang' is 'EAST ANGLIA'.
'where' is the link.
(Other definitions for east anglia that I've seen before include "part of England" , "Norfolk, Suffolk, part of Essex and Cambridgeshire" , "UK region" , "Area of England" , "Part of UK" .)