Gabon upset by charge for water in Australia (9)
I believe the answer is:
billabong
'water in australia' is the definition.
(Australian geographical term)
'gabon upset by charge' is the wordplay.
'upset' indicates an anagram.
'by' is a charade indicator (letters next to each other).
'charge' becomes 'bill' ('bill' can be a synonym of 'charge'**).
'gabon' anagrammed gives 'abong'.
'abong' after 'bill' is 'BILLABONG'.
'for' acts as a link.
(Other definitions for billabong that I've seen before include "Australian backwater -- no big ball (anag)" , "watercourse down under" , "Pool of water in the bed of a stream that flows only in the rainy season" , "Australian pool" , "Branch of an Australian river formed by an overflow" .)