Argument against travel to see African river (5)
I believe the answer is:
congo
'african river' is the definition.
(I've seen this before)
'argument against travel' is the wordplay.
'argument' becomes 'con' (con is a kind of argument).
'against' says to put letters next to each other.
'travel' becomes 'go' ('go' can be a synonym of 'travel'**).
'con'+'go'='CONGO'
'to see' acts as a link.
(Other definitions for congo that I've seen before include "It was known as Zaire" , "Wide river" , "Second longest river of Africa" , "flower" , "Africa country and river" .)