Crossword Genius

Security device (4)

Ross

I believe the answer is:

lock

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">security 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 lock that I've seen before include "Bolt" , "..., stock and barrel" , "Secure a piece of hair" , "temporary container for lighter, say" , "Secure - position in rugby team" .)

I've seen this clue in the Penny Press, The Telegraph and The Times.
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