Get ready, for short (4)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">get ready for short</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 prep that I've seen before include "warm-up race" , "Homework (abbrev.)" , "Homework (abbr.)" , "School work done outside lessons" .)