The term 'calm and composed' can be described by the crossword solutions 'SEDATE', 'SERENE', and 'cool as a cucumber'. SEDATE is an adjective meaning to be quiet and dignified, while SERENE is an adjective meaning peaceful and untroubled. The phrase 'cool as a cucumber' is an idiom meaning to be very calm and collected in a difficult situation. All three of these words and phrases describe someone who is calm and composed.