Warming device (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">warming device</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 heater that I've seen before include "Warming device" , "Source of warmth; gun" , "Room warmer" , "Radiator" , "fire" .)
(Other definitions for radiator that I've seen before include "House-warmer; engine-cooler" , "Apparatus for heating" , "It distributes heat in home, filled with hot water" , "Aid or art, strangely, for the heater" , "Domestic heat source" .)
(Other definitions for space heater that I've seen before include "Large volume warmer" , "device with high-energy blast" , "Dan Dare's gun, perhaps" , "It warms an enclosed area" , "Electric fire perhaps" .)