The most common and most likely answer to this crossword clue is the 7 letter word ORACLES
I've seen this crossword clue in The Daily Telegraph
O
R
A
C
L
E
S
More clues leading to the result ORACLES
- Old people procuring line for high priests?
- Wise people round learner driver cutting speeds
- Authoritative statements, so clear when translated
- They offer wise words: inshore boats a non-starter
- Their predictions are unclear? Wrong – so clear!
- They would be asked question — the answer could be so clear
- Wise utterances from old Dawson, perhaps involving motorists
- They gave advice so wise and so clear when translated
- Authorities vocal about carbon emissions discharged
- Men regularly called in when making predictions
Buddy explains!

The straight part
We know that "Authorities" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case authorities = oracles.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does ORACLES mean?
ORACLES noun- A shrine dedicated to some prophetic deity.
- A person such as a priest through whom the deity is supposed to respond with prophecy or advice.
- A prophetic response, often enigmatic or allegorical, so given.
- A person considered to be a source of wisdom.
- A wise sentence or decision of great authority.
- One who communicates a divine command; an angel; a prophet.
- A theoretical entity capable of answering some collection of questions.
- (Jewish antiquity) The sanctuary, or most holy place in the temple; also, the temple itself.
- To utter oracles or prophecies.