Fire-breather (6)
I believe the answer is:
dragon
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fire-breather</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for dragon that I've seen before include "Fire breathing mythological creature" , "chased by addicts" , "St George's slew one" , "Teutonic mythological creature" , "Monster - type of fly" .)