Revved up (5)
I believe the answer is:
eager
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">revved up</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 eager that I've seen before include "It's a bore" , "Sharp" , "Keen (as a beaver?)" , "Like some beavers" , "Earnest" .)