Drug infused at IV epidural centre (8)

I believe the answer is:

sedative

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

'drug' is the definition.
(I know that sedative is a type of drug of abuse)

'infused at iv epidural centre' is the wordplay.
'SEDATIVE' is hidden within the letters.
But, I'm uncertain how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for sedative that I've seen before include "having soothing effect" , "Calming drug" , "Sleep-inducing drug" , "Dates I've changed for a tranquiliser" , "Sleeping drug" .)

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

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