"Snow White" dwarf (6)
I believe the answer is:
sleepy
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">snow white dwarf</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 sleepy that I've seen before include "Soporific" , "Dozy" , "Somnolent" , "Ready for bed" , "needing a rest" .)