The term 'Mosque Authority' refers to the religious leader of a mosque, who is responsible for leading prayers and providing spiritual guidance. The crossword solution for this term is 'Quran, ' which is the holy book of Islam and the primary source of Islamic teachings. The Quran is believed to be the word of God, revealed to the Prophet Muhammad through the angel Gabriel. Mosque authorities are expected to be knowledgeable in the teachings of the Quran and to be able to interpret it for their congregations.