Crossword puzzle clue "they may be seen in chambers"

ATRIUM, (Latin) a square hall lighted from above, into which rooms open at one or more levels

LAWYER, to work as a member of the legal profession

ION, an electrically-charged particle formed by loss or gain of electrons by an atom

CHIP, to break a small piece from

ADYTUM, (Latin) the inner sanctuary of a temple

AGER, one that ages

AIRLOCK, an obstructing bubble in a pipe

(short for) ammunition