Calm and composed (6)
I believe the answer is:
sedate
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">calm and composed</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for sedate that I've seen before include "Calm, unhurried" , "Prim and proper" , "Quiet and rather dull" , "boring" , "Calm, sober" .)