Some gas at call-centre as they note description of person 'apparently born yesterday (8)

I believe the answer is:

neonatal

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

'they note description of person 'apparently born yesterday' is the definition.
The definition suggests an adverb but the answer is not.

'some gas at call-centre' is the wordplay.
'some gas' becomes 'neon' (neon is a gas).
'centre' says to take the centre.
The middle of 'call' is 'al'.
'neon'+'at'+'al'='NEONATAL'

'as' is the link.

Can you help me to learn more?

(Other definitions for neonatal that I've seen before include "Relating to newborns" , "at a very young age" , "relating to babies" , "Describing newly-born" , "Relating to the newborn" .)

I've seen this clue in The Irish Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.