The most common and most likely answer to this crossword clue is the 7 letter word PROPHET
I've seen this crossword clue in The Guardian
P
R
O
P
H
E
T
More clues leading to the result PROPHET
- Soothsayer gains, by the sound of it
- Support the new forecaster
- Adept on piano, the playing is diviner!
- Support the mad OT character
- Visionary returns from hearing
- Support the unusual seer
- Reportedly return as Jeremiah, perhaps?
- Job for one speaker’s benefit
- Stay with the wretched Daniel, say
- Job description is to make money, you hear
Buddy explains!

The straight part
We know that "Visionary" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case visionary = prophet.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 PROPHET mean?
PROPHET noun- Someone who speaks by divine inspiration.
- Someone who predicts the future; a soothsayer.