The language of the two men! (7)
I believe the answer is:
russian
'the language' is the definition.
(Russian is an example)
'two men' is the wordplay.
'two men' can mean two replacements for 'man'.
'man' becomes 'russ' ().
'man' becomes 'ian' (man's name).
'russ'+'ian'='RUSSIAN'
'of the' acts as a link.
(Other definitions for russian that I've seen before include "Countryman" , "Native of Moscow, say" , "nationality" , "Slavonic tongue" , "Native of St Petersbourg, say" .)