Crossword Genius

Networks stitch up British interloper (4)

Ross

I believe the answer is:

webs

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

'networks' is the definition.
(I know this)

'stitch up british interloper' is the wordplay.
I cannot really see how this works, but
'british' could be 'b' (abbreviation e.g. in 'BBC') and 'b' is found within the answer.
The remaining letters 'wes' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

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

I've seen this clue in the Sydney Morning Herald.
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