Move falteringly over river, one in SE Africa (7)
I believe the answer is:
limpopo
'one in se africa' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'move falteringly over river' is the wordplay.
'move falteringly' becomes 'limp' (limp is a kind of move. I am not sure about the 'falteringly' bit.).
'over' becomes 'o' (cricket abbreviation).
'river' becomes 'Po' (Italian river).
'limp'+'o'+'po'='LIMPOPO'
Can you help me to learn more?
(Other definitions for limpopo that I've seen before include "S. Africa/Zimbabwe border river" , "River of SE Africa" , "African river" , "African runner" , "River of South Africa" .)