Related Clues:

• Herald upfront in a cover-up
• Signal before appearance of wise man
• Be a sign of something to come
• Predict a boring thing for the audience
• Warn of
• "This doesn't __ well ... "
• A guru (anag)
• Be an ominous sign of
• Presage, betoken
• Forewarn of harbour to close
• Predict from an omen
• Act the 14-Across
• Signify for the future
• Warn of jam with last bit not used before date
• Cause to expect