Crossword Genius

Drunk beer from Switzerland that might blow your head off? (6)

Ross

I believe the answer is:

breech

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'drunk beer from switzerland that might blow your head off?' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.

'drunk beer from switzerland' is the wordplay.
'drunk' indicates an anagram.
'from' says to put letters next to each other.
'switzerland' becomes 'ch'.
'beer' anagrammed gives 'bree'.
'bree'+'ch'='BREECH'

Can you help me to learn more?

(Other definitions for breech that I've seen before include "part of Winchester" , "One's behind" , "Opening for loading a gun" , "(Half of) lower garment" , "Back end of a gun barrel" .)

I've seen this clue in the Irish Times and the Irish Times (Crosaire).
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