In hospital, a great struggle with a good ending (4)

I believe the answer is:

ward

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

'in hospital' is the definition.
'ward' can be an answer for 'hospital' (thesaurus). I'm not sure about the 'in' bit.

'a great struggle with a good ending' is the wordplay.
'a great struggle' becomes 'war' (warring is a kind of struggling. I am not sure about the 'great' bit.).
'with' is a charade indicator (letters next to each other).
'ending' suggests the final letters (the ending of the word).
The last letter of 'good' is 'd'.
'war'+'d'='WARD'

Can you help me to learn more?

(Other definitions for ward that I've seen before include "Minor with guardian - division of city" , "Electoral district; Mrs Humphry ---" , "Division of borough" , "Separate room" , "Doctor in 5A 1D [PROFUMO AFFAIR]" .)

I've seen this clue in the Evening Standard.

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