Get ready (informally) (4)
I believe the answer is:
prep
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">get ready informally</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for prep that I've seen before include "Homework (abbr.)" , "Homework (abbrev.)" , "School work done outside lessons" , "warm-up race" .)