Vitality, energy (5)
I believe the answer is:
oomph
<span class="explanation-format__ClueExplanation">I believe this 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">energy</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(oomph can mean energy or excitement)</span><br/ ><br/ ></span>
(Other definitions for oomph that I've seen before include "Shows excitement aplenty" , "Informal energy or enthusiasm, usually in a girl" , "Enthusiasm - vigour - sex appeal" , "15 [SEXINESS]" , "drive" .)