Crossword Genius

Hormone? My mood is being restricted (9)

Ross

I believe the answer is:

cortisone

'hormone?' is the definition.
(I know that cortisone is a type of adrenal cortical steroid)

'my mood is being restricted' is the wordplay.
'my' becomes 'cor' (both are expressions of surprise).
'mood' becomes 'tone' (tone is a kind of mood).
'being restricted' is an insertion indicator.
'tone' going around 'is' is 'tisone'.
'cor'+'tisone'='CORTISONE'

(Other definitions for cortisone that I've seen before include "hormone used in medicine!" , "Steroid" , "anti-inflammatory one" , "Drug" .)

I've seen this clue in The Guardian.
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