Drink around river right by land (5)
I believe the answer is:
terra
'land' is the definition.
(I've seen this before)
'drink around river right' is the wordplay.
'drink' becomes 'tea' (tea is a kind of drink).
'around' is an insertion indicator.
'river' becomes 'r'.
'right' becomes 'r' (common abbreviation).
'r'+'r'='rr'
'tea' placed around 'rr' is 'TERRA'.
'by' is the link.
(Other definitions for terra that I've seen before include "Latin word for earth" , "Centre" , "Legally land" , "-- Firma; -- incognita" , "Land (Latin)" .)