Absolutely correct (6)
'absolutely correct' is the definition.
(spot on means exactly right)
This is the entire clue.
(Other definitions for spoton that I've seen before include "precisely what is needed" , "very accurate" , "precise" , "Exactly!" .)
'absolutely correct' is the definition.
(spot on means exactly right)
This is all the clue.
(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" .)