Virtually pure Scotch Iris distributed in Texan city (6,7)
I believe the answer is:
corpus christi
'texan city' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
'virtually pure scotch iris distributed' is the wordplay.
'virtually' means to remove the last letter (all but the last letter).
'distributed' indicates an anagram.
'pure' with its last letter taken off is 'pur'.
'pur'+'scotch'+'iris'='purscotchiris'
'purscotchiris' anagrammed gives 'CORPUS CHRISTI'.
'in' is the link.
Can you help me to learn more?
(Other definitions for corpus christi that I've seen before include "Church festival; Oxford college" , "Oxbridge college" , "Oxford or Cambridge college" , "Texan city: name shared by colleges at Oxford and Cambridge" .)