Steroid used by escort is Olympian’s (8)

I believe the answer is:

cortisol

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

'used by escort is olympian's' is the wordplay.
'used by' indicates the answer is hidden within the clue.
'CORTISOL' is hidden within 'escort is olympians'.

I've seen this clue in The Times.

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