Cathedral section (4)
I believe the answer is:
nave
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cathedral section</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 nave that I've seen before include "Central part of church" , "Main body of a church" , "Take no risks" , "The hub of a wheel, or body of church" , "Part of a church sounds roguish" .)