Fermented dairy product (4,5)
I believe the answer is:
sour cream
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fermented dairy product</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 sour cream that I've seen before include "dip" , "cooking ingredient" , "salad dressing" , "Rich savoury food" , "Fermented dairy product" .)