Model in intensive care unit, initially suffering a stroke (5)

I believe the answer is:

ictus

I'm a little stuck... Click here to teach me more about this clue!

'a stroke' is the definition.
(I've seen this before)

'model in intensive care unit initially suffering' is the wordplay.
'model' becomes 'T' (Ford Model T car).
'in' is an insertion indicator.
'intensive care' becomes 'IC' (medical abbreviation).
'unit' becomes 'u' (this might be a standard abbreviation of which I'm unaware).
'initially' suggests taking the first letters.
The first letter of 'suffering' is 's'.
'ic'+'u'='icu'
't' put into 'icu' is 'ictu'.
'ictu'+'s'='ICTUS'

Can you help me to learn more?

(Other definitions for ictus that I've seen before include ""fit"" , "Stroke" , "Sudden attack" , "Metrical stress" , "Is cut (anag.)" .)

I've seen this clue in the Sydney Morning Herald.

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