Church part (4)
'church part' is the definition.
('apse' is part of 'church')
This is all the clue.
(Other definitions for apse that I've seen before include "may be seen in church!" , "Church recess in lapsed condition" , "Recess with domed rof in a church" , "where praetor sat" , "Recess in church wall" .)
'church part' is the definition.
(I know that nave is part of church)
This is the entire clue.
(Other definitions for nave that I've seen before include "Part of a church sounds roguish" , "Central space in church" , "Central place in church" , "Central area in a church" , "Central part of church" .)