Church singer (9)
I believe the answer is:
chorister
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">church singer</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 chorister that I've seen before include "Boy in church" , "Choirboy or girl" , "Boy singer" , "Choir member" , "Church, cathedral singer" .)