Six-footer in mascara blushes (6)
I believe the answer is:
scarab
'six-footer' is the definition.
(I know that scarab is a type of six-footer)
'in mascara blushes' is the wordplay.
'in' indicates a hidden word.
'SCARAB' is hidden within 'mascara blushes'.
(Other definitions for scarab that I've seen before include "divine creature" , "Holy beetle" , "old lucky charm" , "crawler" , "Egyptian stone" .)