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