Nurse gets hose inserted for shock treatment (6)

I believe the answer is:

epipen

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'shock treatment' is the definition.
I know nothing about this answer so I can't tell whether this works.

'nurse gets hose inserted' is the wordplay.
'nurse' becomes 'EN' (abbreviation for state-enrolled nurse).
'gets hose' becomes 'pipe' (I can't explain this - if you can you should believe this answer much more).
'inserted' is an insertion indicator.
'en' enclosing 'pipe' is 'EPIPEN'.

'for' acts as a link.

Can you help me to learn more?

I've seen this clue in The Independent.

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