Crossword Genius

Delivery info initially upset person (3)

Ross

I believe the answer is:

bod

'person' is the definition.
(bod can informally mean a person or body)

'delivery info initially upset' is the wordplay.
'delivery info initially' becomes 'DOB' (initials of Date of Birth - delivery as in birth).
'upset' is a reversal indicator.
'dob' back-to-front is 'BOD'.

(Another definition for bod that I've seen is " Bloke".)

I've seen this clue in The Guardian.
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