Below are possible answers for the crossword clue On the ball.
engaged in or accustomed to close observation; "caught by a couple of alert cops"; "alert enough to spot the opportunity when it came"; "constantly alert and vigilant, like a sentinel on duty"
mentally perceptive and responsive;"an alert mind"; "alert to the problems"; "alive to what is going on"; "awake to the dangers of her situation"; "was now awake to the reality of his predicament"
warn or arouse to a sense of danger or call to a state of preparedness; "The empty house alarmed him"; "We alerted the new neighbors to the high rate of burglaries"
an automatic signal (usually a sound) warning of danger
quick and energetic;
a warning serves to make you more alert to danger
condition of heightened watchfulness or preparation for action; "bombers were put on alert during the crisis"
marked by practical hardheaded intelligence; "a smart businessman"; "an astute tenant always reads the small print in a lease"; "he was too shrewd to go along with them on a road that could lead only to their overthrow"
(sometimes followed by `of') having or showing knowledge or understanding or realization or perception; "was aware of his opponent's hostility"; "became aware of her surroundings"; "aware that he had exceeded the speed limit"
bearing in mind; attentive to; "ever mindful of her health"; "mindful of his responsibilities"; "mindful of these criticisms, I shall attempt to justify my action"
capable of independent and apparently intelligent action; "smart weapons"
improperly forward or bold; "don't be fresh with me"; "impertinent of a child to lecture a grownup"; "an impudent boy given to insulting strangers"; "Don't get wise with me!"
showing mental alertness and calculation and resourcefulness
elegant and stylish; "chic elegance"; "a smart new dress"; "a suit of voguish cut"
quick and brisk; "I gave him a smart salute"; "we walked at a smart pace"
be the source of pain
characterized by quickness and ease in learning; "some children are brighter in one subject than another"; "smart children talk earlier than the average"
painfully severe; "he gave the dog a smart blow"
a kind of pain such as that caused by a wound or a burn or a sore
Other crossword clues with similar answers to 'On the ball'