Not a single person from Spain under twelve (2-3)
I believe the answer is:
no-one
'not a single person' is the definition.
(I've seen this before)
'spain under twelve' is the wordplay.
'spain' becomes 'e' (abbreviation for Espana).
'under' says to put letters next to each other.
'twelve' becomes 'noon' (I've seen this before).
'e' put after 'noon' is 'NO-ONE'.
'from' is the link.
(Other definitions for no-one that I've seen before include "Not a single person" , "Not a soul" , "Not one person" , "Nobody" .)