Brat's opposite (5)
I believe the answer is:
angel
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">brat's opposite</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 angel that I've seen before include "Person of beauty, purity or kindness?" , "Investor for show" , "Heavenely messenger" , "Theatre backer" , "Messenger < is a nurse" .)