Basilica section
I think it could be either:
'basilica section' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for apse that I've seen before include "may be seen in church!" , "Domed section of a church" , "Niche in church" , "Offshoot from the choir, nave or aisle in a church" , "space for altar" .)
'basilica section' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for nave that I've seen before include "The hub of a wheel, or body of church" , "Central part of church" , "Main body of a church" , "Part of the church sounds like a rogue" , "Part of a church sounds roguish" .)