Isolated community (9)
(Other definitions for backwater that I've seen before include "Place where no development happens" , "in the sticks" , "place of inactivity" , "Stagnant part of a river" , "Isolated place" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">isolated community</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for enclave that I've seen before include "Area enclosed within a foreign territory" , "Part of country surrounded by another" , "Piece of territory within another country" , "Small territory owned by one state but lying within another" , "Isolated territory enclosed by valence" .)