Become more distant (6)
I believe the answer is:
recede
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">become more distant</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for recede that I've seen before include "Decline" , "Decree (anag) - ebb" , "Start balding" , "Go backwards" , "Withdraw" .)