A detached area in church (5)
I believe the answer is:
aisle
'church' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'a detached area' is the wordplay.
'detached area' becomes 'isle' (I have seen 'Area of land' mean 'isle' so perhaps 'area' could also mean 'isle'. I am not sure about the 'detached' bit.).
'a'+'isle'='AISLE'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for aisle that I've seen before include "Passage down the side of a church nave" , "lateral strip" , "Passageway between seating areas" , "Path between seats in church" , "Supermarket section" .)