Crossword Genius

Fly catchers made using empty waste bins (4)

Ross

I believe the answer is:

webs

I'm a little stuck... Click here to teach me more about this clue!

'fly catchers' is the definition.
(I've seen this in another clue)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for webs that I've seen before include "Spiders' creations" , "delicate tissues" .)

I've seen this clue in The Irish Times.
Want a hint initially instead of a full solution? Install my app