Steps up to the plate (4)
I believe the answer is:
bats
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">steps up to the plate</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 bats that I've seen before include "out to lunch" , "Very eccentric" , "Night-flying creatures" , "Crazy - mammals" , "Take a stab at the night creatures" .)