Productive (8)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">productive</span>' is the definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for fruitful that I've seen before include "rich" , "Fertile, abundant" , "Fertile, productive" , "Rewarding" , "Prolific in bearing offspring" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">productive</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for useful that I've seen before include "Make yourself . . . . . . - help out" , "Of service" , "Utilitarian" , "Advantageous; very able" , "Of practical assistance" .)