Heads-up Crossword Clue

• (noun)
  1. condition of heightened watchfulness or preparation for action
  2. a warning serves to make you more alert to danger
• (verb)
  1. warn or arouse to a sense of danger or call to a state of preparedness
• (adjective)
  1. engaged in or accustomed to close observation
  2. mentally perceptive and responsive

• HEADS-UP (adjective)
  1. fully alert and watchful
• HEADS-UP (noun)
  1. a warning message

• DUCK
  (4 letters)
• THINKFAST
  (9 letters)
• CHAIRS
  (6 letters)
• SOARS
  (5 letters)
• LOOKOUT
  (7 letters)
• RUNS
  (4 letters)

Unscramble the letters below to solve for today's answer.
ALTER