Large store (8)
I believe the answer is:
emporium
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">large store</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 emporium that I've seen before include "Make up memoir about a very large shop" , "Large department store" , "A large imposing shop" , "Big shop" , "Large and ostentatious retail establishment" .)