Vigorous and enthusiastic enjoyment (5)
I believe the answer is:
gusto
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">vigorous and enthusiastic enjoyment</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for gusto that I've seen before include "Hearty enjoyment" , "Spirit" , "Relish - zest" , "(Corporate) emblem" , "Zest, great enjoyment in doing" .)