Constitution: slap (4-2)
I believe the answer is:
make-up
I believe this clue is a double definition.
'constitution' is the first definition.
(I've seen this before)
'slap' is the second definition.
(I've seen this before)
(Other definitions for make-up that I've seen before include "Cosmetics, face-paint" , "Lipstick, mascara etc" , "Reconcile after a quarrel" , "Cosmetics for self-beautification" , "Cosmetics in general" .)