I went for a point, kept calm (6)
I believe the answer is:
placid
'calm' is the definition.
(similar in meaning)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for placid that I've seen before include "Quiet and still" , "not easily angered" , "Calm and still" , "Calm, phlegmatic" , "Serene - unruffled" .)