Not a single person (2,3)

'not a single person' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for no one that I've seen before include "Nobody" , "Cipher" , "Not a soul" , "unimportant?" , "who is perfect?" .)
'not a single person' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for nobody that I've seen before include "Not one person" , "Insignificant person" , "Nonentity" , "The Diary of a --- (George &Weedon Grossmith)" , "Cipher" .)