Go into hospital in stole — it gets attached to stretcher (10)

I believe the answer is:

tenterhook

'it gets attached to stretcher' is the definition.

'go into hospital in stole' is the wordplay.
'go into' becomes 'enter' (enter can mean to go into a place).
'hospital' becomes 'h' (abbreviation for hospital on maps).
'in' is an insertion indicator.
'stole' becomes 'took' (I've seen this in another clue).
'enter'+'h'='enterh'
'enterh' put into 'took' is 'TENTERHOOK'.

(Another definition for tenterhook that I've seen is " Fastener to stretch cloth".)

I've seen this clue in The Guardian.

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