Cost-effective (10)
(Other definitions for economical that I've seen before include "Careful" , "Reasonable" , "Thrifty" , "Using little" , "Inexpensive" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cost-effective</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 economic that I've seen before include "(Likely to be) profitable" , "Relating to careful financial management" , "Sparing with resources or money" , "Likely to bring a profit" , "Coo, mince! (anag.)" .)