Crossword clue: a domed or vaulted recess or projection on a building especially the east end of a church; usually contains the altar

The most common answer is apse (4 letters).

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

apse 4 letters wn-def

a domed or vaulted recess or projection on a building especially the east end of a church; usually contains the altar

apsis 5 letters wn-def

a domed or vaulted recess or projection on a building especially the east end of a church; usually contains the altar