Towards the rear (6)
I believe the answer is:
astern
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">towards the rear</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 astern that I've seen before include "following behind vessel" , "State of S central US" , "Rearward" , "Toward the back of a boat" , "Behind (naut.)" .)