Tooth doctor in Irish centre (5)

I believe the answer is:

molar

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

'tooth' is the definition.
(I know that molar is a type of tooth)

'doctor in irish centre' is the wordplay.
'doctor in' becomes 'mola' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'irish' becomes 'hibernian' (I've seen this before).
'centre' indicates the central letters.
The middle letter of 'hibernian' is 'r'.
'mola'+'r'='MOLAR'

Can you help me to learn more?

(Other definitions for molar that I've seen before include "that could be capped" , "Dealing with masses" , "Large tooth" , "of ivory, perhaps" , "Chewer and grinder" .)

I've seen this clue in The Irish Times.

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