Wealthy industrialist (3,3)
I believe the answer is:
fat cat
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">wealthy industrialist</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 fat cat that I've seen before include "pampered pet" , "Someone (undeservedly?) rich in business" , "Rich man" , "Wealthy and privileged person" , "Wealthy and powerful person (informal)" .)