Invent cosmetics (4-2)
I believe the answer is:
This clue is a double definition.
'invent' is the first definition.
(I know that invent can be written as make up)
'cosmetics?' is the second definition.
(I've seen this before)
(Other definitions for make-up that I've seen before include "Composition - cosmetics" , "foundation?" , "Supplement" , "Bury the hatchet" , "Heal breach, become friends again" .)