Class favourite (8,3)
I believe the answer is:
teachers pet
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">class favourite</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 teachers pet that I've seen before include "goody-goody" , "Student of form favoured" , "Class favourite" , "Subject of favouritism at school" , "Favoured pupil" .)