Naught
'naught' is the definition.
(I know that naught can be written as nothing)
This is all the clue.
(Other definitions for nothing that I've seen before include "Nought; of no value" , "Naught, nil, nix" , "Item of no importance" , "trivial event" , "Something sweet" .)
'naught' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for nil that I've seen before include "none" , "Love" , "There's nothing left" , "duck" , "Latin zero" .)
'naught' is the definition.
(I know that naught can be written as zilch)
This is all the clue.
(Other definitions for zilch that I've seen before include "Nothing (American)" , "Nil" , "Diddly-squat" , "Zip" , "Sweet FA (slang)" .)