Minus (4)
'minus' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for less that I've seen before include "Wanting" , "A smaller amount" , "Comparative of 'a little'" , "minor" , "Fewer; minus" .)
'minus' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for negative that I've seen before include "Expressing or implying denial or refusal" , "Reply of denial" , "The photographic film expresses refusal" , "Defeatist" , "A test result" .)