Duck in river in Italy and river in African country (7)
I believe the answer is:
pochard
'duck' is the definition.
(I know that pochard is a type of duck)
'river in italy and river in african country' is the wordplay.
'river in italy' becomes 'po' (Italian river).
'and' says to put letters next to each other.
'river' becomes 'r' (abbreviation for river).
'in' means one lot of letters goes inside another.
'african country' becomes 'Chad' (country in Africa).
'r' inserted into 'chad' is 'chard'.
'po'+'chard'='POCHARD'
'in' acts as a link.
(Other definitions for pochard that I've seen before include "bird" , "Type of diving duck" , "Spanish wine" , "diver" .)