Crossword Genius

Scotch sword (4)

Ross

I believe the answer is:

foil

I believe this clue is a double definition.

'scotch' is the first definition.
(synonyms)

'sword' is the second definition.
(foil is a kind of sword)

(Other definitions for foil that I've seen before include "Frustrate - light sword" , "Parry" , "Tharwt with Sword" , "Check" , "Fencing rapier" .)

I've seen this clue in The Sun.
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