Wonderful, fantastic (5)
I believe the answer is:
great
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">wonderful</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that wonderful can be written as great)</span><br/ ><br/ >'<span class="explanation-format__original">fantastic</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(fantastic can mean great or excellent)</span><br/ ><br/ ></span>
(Other definitions for great that I've seen before include "Large, important" , "Large, fantastic" , "Extensive; excellent" , "Large; fine" , "Brunel's third and last steamship" .)