City can produce language (5)
I believe the answer is:
latin
'language' is the definition.
(Latin is an example)
'city can' is the wordplay.
'city' becomes 'LA' (Los Angeles).
'can' becomes 'tin' (both are metal containers).
'la'+'tin'='LATIN'
'produce' acts as a link.
(Other definitions for latin that I've seen before include "Language of old 8 down" , "Old Roman language" , "foreign language" , "Language of Cicero" , "and 15 Down: Student area of Paris" .)