Moisten with hot fat (5)
I believe the answer is:
baste
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">moisten with hot fat</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for baste that I've seen before include "Moisten with hot fat" , "Keep moisturised when baking" , "Moisten with liquid fat while roasting" , "Moisten roasting meat with melted fat" , "Pour fat over meat during cooking" .)