River flowing into the Bay of Bengal (6)
I believe the answer is:
ganges
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">river flowing into the bay of bengal</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for ganges that I've seen before include "Sacred river of N India" , "Indian flower" , "Sacred Indian river" , "Holy river on India" , "River flowing into the Bay of Bengal" .)