The same hospital admits musician (7)

I believe the answer is:

sideman

'musician' is the definition.
(I know that sideman is a type of musician)

'the same hospital admits' is the wordplay.
'the same' becomes 'idem' (Latin for 'the same', used in citations).
'hospital' becomes 'san' (short for sanatorium).
'admits' indicates putting letters inside.
'idem' inserted inside 'san' is 'SIDEMAN'.

(Another definition for sideman that I've seen is " Jazz musician".)

I've seen this clue in The Guardian.

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