River of Africa, Northern Ireland and part of Germany? (5)
I believe the answer is:
niger
'river of africa' is the definition.
(I've seen this in another clue)
'northern ireland and part of germany?' is the wordplay.
'northern ireland' becomes 'NI' (abbreviation).
'and' is a charade indicator (letters next to each other).
'part of germany?' becomes 'ger' (I am not sure about this - if you are sure you should believe this answer much more).
'ni'+'ger'='NIGER'
Can you help me to learn more?
(Other definitions for niger that I've seen before include "West African republic" , "Country in interior of N Africa, capital Niarney" , "River of West Africa" , "one flowing through Mali" , "West African river and country" .)