Cosmetic application end of nose certainly experienced? That hurts! (9)
I believe the answer is:
eyeshadow
'cosmetic application' is the definition.
(cosmetic for one's eyelids)
'end of nose certainly experienced? that hurts' is the wordplay.
'end of' says to take the final letters.
'certainly' becomes 'yes' (both can be used to answer in the affirmative).
'experienced?' becomes 'had' (have can mean to experience or go through).
'that hurts' becomes 'ow!'.
The final letter of 'nose' is 'e'.
'e'+'yes'+'had'+'ow'='EYESHADOW'
(Other definitions for eyeshadow that I've seen before include "used to put dark side into orbit" , "Kind of warpaint?" , "beauty aid" , "part of make-up" , "application to viewers" .)