Delivery option from Carson's top department (1-7)

I believe the answer is:

c-section

'delivery option' is the definition.
(Caesarean section during the delivery of a baby)

'carson's top department' is the wordplay.
'top' indicates taking the first letters.
'department' becomes 'section' (section can mean a department or area).
The first letter of 'carsons' is 'c'.
'c'+'section'='C-SECTION'

'from' acts as a link.

I've seen this clue in The Independent.

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