Fly traps made from empty wine bottles (4)
I believe the answer is:
webs
'fly traps' is the definition.
'empty wine bottles' is the wordplay.
'empty' says to hollow out the word (remove centre letters).
'bottles' becomes 'bs' (I am not sure about this - if you are sure you should believe this answer much more).
'wine' with its middle taken out is 'we'.
'we'+'bs'='WEBS'
'made from' acts as a link.
(Other definitions for webs that I've seen before include "Spiders' creations" , "delicate tissues" .)