Crossword Genius

The superior is out of hospital (6)

Ross

I believe the answer is:

better

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

'the superior' is the definition.
(better is a kind of superior)

'is out of hospital' is the wordplay.
I cannot quite understand how this works, but
'is' could be 'be' and 'be' is present in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for better that I've seen before include "he will take risks" , "Improve upon" , "More desirable; gambler" , "Gambler; more effective" , "More acceptable" .)

I've seen this clue in the Evening Standard.
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