One caring for horses (5)
I believe the answer is:
groom
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">one caring for horses</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 groom that I've seen before include "Train, make ready" , "Stable attendant" , "Stableboy" , "Horse carer" , "fellow for the match" .)