### Clue: How belated message might be given for native Africans? (4)
### Answer: ASPS 
 ### Explanation: Definition: native Africans
 [ AS P.S.](a belated message;an afterthought might be given as a p.s.;a postscript).
Defn: … of the reptilian kind, which name was used to refer to various venomous snakes found in the Nile region.