Possible Clues:

• Sign of maturity suppressed by most of journalists
• Be a sign of (something)
• Prince Harry agrees to forecast
• Endlessly push time as a warning
• Forebode
• Signal before appearance of wise man
• Warn of jam with last bit not used before date
• Be a warning of
• Be a sign or warning of (something about to happen)
• Endless crush preceding time signal