Robust, vigorous (5)
I believe the answer is:
lusty
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">robust</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >'<span class="explanation-format__original">vigorous</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for lusty that I've seen before include "Brawny" , "Robust - vigorous" , "Full-blooded" , "Full of health, vigour" , "Stout" .)