Door opener? (4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">door opener</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 knob that I've seen before include "Turning handle" , "Ball" , "Protuberance" , "Hump" , "Little group of wildfowl" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">door opener</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 key that I've seen before include "Coral reef off southern coast of Florida" , "Clue" , "Crucial; island" , "Lock-opener" , "Crucial arch-stone" .)