Cathedral, large church (7)
I believe the answer is:
minster
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">cathedral</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(minster is a kind of cathedral)</span><br/ ><br/ >'<span class="explanation-format__original">large church</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for minster that I've seen before include "Large church (or cathedral at York)" , "Large church (eg, York)" , "Old monastic cathedral, such as York's" , "Abbey or priory church" , "Clergyman" .)