Fly-swatter material (4)
I believe the answer is:
mesh
'fly-swatter material' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for mesh that I've seen before include "Knit or weave for Shem" , "Become entangled - become engaged" , "Piece of netting" , "Grid, netting" , "Engagement" .)