Add liquor to (4)
I believe the answer is:
lace
'add liquor to' is the definition.
(I've seen this in another clue)
This is all the clue.
(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" .)