Lucrative
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lucrative</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 profitable that I've seen before include "Cost-effective" , "offering good returns" , "useful" , "Rewarding" , "Money-spinning" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lucrative</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for gainful that I've seen before include "Bringing in money" , "Profitable and productive" .)