Give support to (4)
I believe the answer is:
back
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">give support to</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for back that I've seen before include "Rear -- endorse" , "Returned" , "Rear surface of the body" , "bet" , "player in line of defence?" .)