Passage in a detached place (5)
I believe the answer is:
aisle
'passage' is the definition.
(aisle is a kind of passage)
'a detached place' is the wordplay.
'detached place' becomes 'isle' (I've seen this before).
'a'+'isle'='AISLE'
'in' acts as a link.
(Other definitions for aisle that I've seen before include "Way between seats" , "The way to get married in church?" , "Path between seats in church" , "Passage between pews" , "Passage between seating areas" .)