Possible Clues:

• The traffic-light between red and green
• A person in club ignoring first person's cautionary signal
• Warning to traffic: tilt of road with top layer missing
• Warning signal for a physician to HM
• Fossil container, sometimes
• Resin from ancient trees
• Honey-yellow colour
• Honour accorded to a king supplies cautionary signal
• Warning light forever written about
• Daughter out of bed runs in morning at first light