Teach, coach (5)
I believe the answer is:
train
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">teach</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that train is a type of teach)</span><br/ ><br/ >'<span class="explanation-format__original">coach</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(both can mean to instruct a sportsperson)</span><br/ ><br/ ></span>
(Other definitions for train that I've seen before include "Suite; give practice (in)" , "Aim < to prepare < railway carriages" , "Prepare for public transport?" , "Tailpiece of bridal gown" , "tutor" .)