I work with Russian initially — him? (4)
I believe the answer is:
igor
'him?' is the definition.
'i work with russian initially' is the wordplay.
'work' becomes 'go' (synonyms).
'with' says to put letters next to each other.
'initially' suggests taking the first letters.
The initial letter of 'russian' is 'r'.
'i'+'go'+'r'='IGOR'
(Other definitions for igor that I've seen before include "Stravinsky, for example" , "Prince --, opera by Borodin" , "Russian boy" , "-- Stravinsky, composer" , "Stravinsky, perhaps" .)