In Paris a supermarket removes Tango for major international operation (6)
I believe the answer is:
unesco
'major international operation' is the definition.
(UN organisation)
'in paris a supermarket removes tango' is the wordplay.
'in paris a' becomes 'un' ('a' in French).
'supermarket' becomes 'Tesco' (UK supermarket).
'removes' suggests deleting specific letters.
'tango' becomes 'T' (phonetic alphabet: alpha, bravo, charlie etc.).
'tesco' with 't' removed is 'esco'.
'un'+'esco'='UNESCO'
'for' is the link.
(Other definitions for unesco that I've seen before include "UN body" , "UN organisation" , "International cultural organisation" , "United Nations agency that promotes education etc" , "World cultural and educational organisation" .)