Pistol, say (7)
I believe the answer is:
sidearm
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pistol say</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that pistol is a type of handgun)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for sidearm that I've seen before include "weapon" , "One may be fired" , "Piece" , "Officer may carry this" .)