Venezuelan river (7)
I believe the answer is:
orinoco
'venezuelan river' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for orinoco that I've seen before include "Common character" , "Great river in the north of S America, flows through Venezuela" , "Venezuelan river; one of Wombles" , "Colombia/Venezuela river" , "River, rising in Venezuela, forming part of its border with Colombia and flowing into the Atlantic" .)