Add liquor to (4)
I believe the answer is:
lace
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">add liquor to</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for lace that I've seen before include "Flimsy fabric or shoe fasterner" , "Tear" , "Famous play ''Arsenic and Old . . . .''" , "Fabric made in openwork design" , "Spike - ornamental fabric" .)