Pacesetter (6)
I believe the answer is:
leader
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pacesetter</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 leader that I've seen before include "Guide; editorial" , "Front-runner or head of group" , "One whose example is followed" , "Boss, commander" , "Main editorial in a newspaper" .)