Take (an exam) again (5)
I believe the answer is:
resit
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">take an exam again</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 resit that I've seen before include "Take examination again" , "second exam" , "Repeat (an exam)" , "later exam" , "Student's test" .)