Farther than (6)
I believe the answer is:
beyond
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">farther than</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 beyond that I've seen before include "Further than or outside the scope of" , "Past" , "Farther along in space, time or degree" , "Farther than or outside" , "On the farther side - in addition" .)