Not feeling excited, one entering in hospital department (10)

I believe the answer is:

insentient

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'not feeling' is the definition.
The answer and definition are not the same part of speech.

'excited one entering in hospital department' is the wordplay.
'excited' becomes 'sent' (send can mean to excite or stimulate).
'one' becomes 'i' (Roman numeral).
'entering' is an insertion indicator.
'hospital department' becomes 'ENT' (Ear, Nose and Throat department).
'sent'+'i'='senti'
'in'+'ent'='inent'
'senti' put into 'inent' is 'INSENTIENT'.

Can you help me to learn more?

(Other definitions for insentient that I've seen before include "Incapable of feeling" , "Unaware" , "Feeling nothing" .)

I've seen this clue in The Times.

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