Web spinner (6)
I believe the answer is:
spider
'web spinner' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for spider that I've seen before include "Prised out the insect" , "Flycatcher?" , "Eight-legged webmaster?" , "Tarantula, say?" , "Prised open the arachnid" .)