Absolutely correct (4-2)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">absolutely correct</span>' is the definition.<br/ ><span class="explanation-format__explanation">(spot on means exactly right)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for spoton that I've seen before include "precisely what is needed" , "very accurate" , "precise" , "Exactly!" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">absolutely correct</span>' is the definition.<br/ ><span class="explanation-format__explanation">(spot on means exactly right)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for spot-on that I've seen before include "Informally - exactly so, precisely" , "Precisely correct" , "Perfect" , "On the button, precisely so" , "Informally precise, exactly right" .)