Recreational runner (6)
I believe the answer is:
jogger
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">recreational runner</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 jogger that I've seen before include "Fitness runner" , "Recreational runner" , "One running for fitness" , "Urban exerciser on the trot" , "Aide-memoire, perhaps" .)