"All systems go!" (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">all systems go</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 ready that I've seen before include "Fully prepared" , "Intelligent" , "Fully-prepared" , "Prepared, willing" , "Cash; within reach" .)