Dispute in Camargue when river’s blocked (5)
I believe the answer is:
argue
'dispute' is the definition.
(to argue something is to dispute or contest it)
'camargue when river's blocked' is the wordplay.
'ARGUE' is hidden within the letters.
However, I am uncertain how this is indicated.
'in' acts as a link.
(Other definitions for argue that I've seen before include "Fall out" , "Debate, row" , "Squabble" , "Dispute - debate" , "Debate, contest verbally" .)