Eyelash enhancer (7)
I believe the answer is:
mascara
'eyelash enhancer' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for mascara that I've seen before include "Make-up item" , "Eyelash cosmetic" , "Make-up for eyelashes" , "Makeup used to darken and thicken the eye lashes" , "facial cosmetic" .)