Garlic mayo (5)
I believe the answer is:
aioli
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">garlic mayo</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 aioli that I've seen before include "Sort of mayonnaise" , "Garlic 9" , "Garlicky mayonnaise" , "11 [SAUCE]" , "Mayonnaise seasoned with mayonnaise" .)