Poised for action (5)
I believe the answer is:
ready
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">poised for action</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 ready that I've seen before include "In addition" , "All set to go" , "game?" , "Cash; within reach" , "for immediate use" .)