Cathedral, large church (7)
I believe the answer is:
minster
I believe this is a double definition.
'cathedral' is the first definition.
(minster is a kind of cathedral)
'large church' is the second definition.
(I've seen this before)
(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" .)