Answer: thehorsesmouth

AnswerCrossword Clue
THEHORSESMOUTH

Unquestionable authority

THEHORSESMOUTH

Unimpeachable source

THEHORSESMOUTH

Impeccable authority

THEHORSESMOUTH
Joyce Cary novel
THEHORSESMOUTH
Symbol of high authority
THEHORSESMOUTHAlec Guinness classic: 1958
THEHORSESMOUTHSource of firm information