The white in snooker (3,4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">the white in snooker</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for cue ball that I've seen before include "Object struck by a snooker player" , "Jimmy White's white?" , "The white in snooker" , "Feature of pub entertainment" .)
(Another definition for cueball that I've seen is " white?".)