Bomber attribute (7)
I believe the answer is:
stealth
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bomber attribute</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 stealth that I've seen before include "Cautious and surreptitious action or movement" , "Avoidance of detection by moving carefully" , "word to define secrecy" , "Low-visibility military technology" , "Kind of indirect tax" .)