Crossword Genius

Foiled - the trespassers? (6)

Ross

I believe the answer is:

fenced

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'foiled the trespassers?' is the definition.
The answer and definition can be both to do with contact as well as being past participle verbs.
Perhaps you can see a link between them that I don't see?

This is all the clue.

Can you help me to learn more?

(Other definitions for fenced that I've seen before include "Enclosed with a palisade" , "protected by barrier" , "Got hold of hot stuff" , "Enclosed with palings" , "Enclosed by hedges or engaged in swordplay" .)

I've seen this clue in The Guardian and The Globe and Mail.
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