Calm, even-tempered (7)
I believe the answer is:
equable
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">calm</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >'<span class="explanation-format__original">even-tempered</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ ></span>
(Other definitions for equable that I've seen before include "composed" , "Calm, even-tempered" , "Not extreme" , "not easily rattled" , "Cool" .)