The most common and most likely answer to this crossword clue is the 7 letter word PRESAGE
I've seen this crossword clue in Independent
P
R
E
S
A
G
E
More clues leading to the result PRESAGE
- Herald newspapers cut time
- Herald quietly agrees to travel around
- Warn of / present time / prior to knowing
- Herald prior to becoming wise?
- Section of book containing research forecast
- Forecast by media ignoring second generation
- Prince Harry agrees to forecast
- Endless crush preceding time signal
- Warn of jam with last bit not used before date
- Like ScarboroughFair’s parsley portent?
Buddy explains!

The straight part
We know that "forecast" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case forecast = presage.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 PRESAGE mean?
PRESAGE noun- A warning of a future event; an omen.
- An intuition of a future event; a presentiment.
- To predict or foretell something.
- To make a prediction.
- To have a presentiment of; to feel beforehand; to foreknow.