Sentinel (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sentinel</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for guard that I've seen before include "Sentry" , "Protect(or)" , "Custodian" , "Screw" , "state of caution" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sentinel</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that sentinel can be written as lookout)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for lookout that I've seen before include "Nightwatchman" , "Watchtower" , "View" , "Watchman" , "One keeping watch" .)