Vitality, sex appeal (5)
I believe the answer is:
oomph
I believe this clue is a double definition.
'vitality' is the first definition.
(I've seen this in another clue)
'sex appeal' is the second definition.
(I know that sex appeal can be written as oomph)
(Other definitions for oomph that I've seen before include "Ginger" , "Spirited vigour" , "vital quality" , "sex-appeal" , "attractiveness" .)