In-laws ought to heartily chuckle (5)

I believe the answer is:

laugh

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

'chuckle' is the definition.
(I've seen this before)

'in-laws ought to heartily' is the wordplay.
'in laws' becomes 'la' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'to heartily' indicates the central letters (the inside or heart of the word).
The centre of 'ought' is 'ugh'.
'la'+'ugh'='LAUGH'

Can you help me to learn more?

(Other definitions for laugh that I've seen before include "Break up" , "Show mirth" , "Sound amused" , "Express joy or amusement" , "Good fun" .)

I've seen this clue in The Irish Times.

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