African expression of disapproval -- second one (5)
I believe the answer is:
tutsi
'african' is the definition.
(I've seen this before)
'expression of disapproval second one' is the wordplay.
'expression of disapproval' becomes 'tut' (I've seen this before).
'second' becomes 's' (common abbreviation).
'one' becomes 'i' (roman numeral).
'tut'+'s'+'i'='TUTSI'
(Other definitions for tutsi that I've seen before include "Ethnic group of Rwanda and Burundi" , "tribesman" , "African tribe" , "Member of a Bantu people of Rwanda and Burundi" , "Member of a people living in Rwanda and Burundi" .)