Language used in Nairobi boulevards? (3)
I believe the answer is:
ibo
'language' is the definition.
(thesaurus)
'in nairobi boulevards?' is the wordplay.
'in' indicates a hidden word.
'IBO' is hidden within 'nairobi boulevards'.
'used' acts as a link.
(Other definitions for ibo that I've seen before include "Language of Nigeria" , "Nigerian tribesman" , "Native of SE Nigeria" , "SE Nigerian language" , "One of chief cultural languages of Nigeria" .)