Liddell-Scott-Jones

ἐξηγητής (exēgētēs) an expositor ^G:N-M

ἐξηγητής-ητής, οῦ, ὁ,

one who leads on, adviser, πρηγμάτων ἀγαθῶν [Refs 5th c.BC+]

__II expounder, interpreter, especially of oracles, dreams, or omens, [Refs 5th c.BC+]; at Athens, of sacred rites or customs, modes of burial, expiation, etc., spiritual director, [Refs 5th c.BC+]: as an official title, ἐ. Πυθόχρηστος [Refs 5th c.BC+], cf. Suid. see entry ; πάτριος ἐ., of Apollo, [Refs 5th c.BC+]
__II.b at Rome, of the pontifices, [Refs 1st c.BC+]
__II.2 guide, cicerone, to temples, etc., [Refs 2nd c.AD+]
__II.3 commentator, [Refs 2nd c.AD+]