Advantageous purchase (7)
I believe the answer is:
bargain
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">advantageous purchase</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for bargain that I've seen before include "special deal" , "Haggle; a good deal" , "Barter, negotiate" , "Good buy" , "Good-value purchase" .)