Pet saying involved Africans (9)
I believe the answer is:
egyptians
'africans' is the definition.
(Egyptian is an example)
'pet saying involved' is the wordplay.
'involved' is an anagram indicator (involved can mean confusing or complex).
'pet'+'saying'='petsaying'
'petsaying' anagrammed gives 'EGYPTIANS'.
(Other definitions for egyptians that I've seen before include "race" , "Pet saying about some who come from North Africa" , "Natives of Cairo, say" , "people" , "I spy agent among these nationals" .)