Bulletproof (8)
I believe the answer is:
armoured
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bulletproof</span>' is the definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for armoured that I've seen before include "bullet-proof?" , "Having protective covering" , "Well protected" , "Protectively covered" , "protected against attack?" .)