Call head office for a laugh (2-2)

I believe the answer is:

ho-ho

'a laugh' is the definition.
(thesaurus)

'call head office' is the wordplay.
'call' becomes 'ho' (historical exclamation used to attract attention).
'head office' becomes 'HO'.
'ho'+'ho'='HO-HO'

'for' is the link.

(Another definition for ho-ho that I've seen is " Santa's laugh".)

I've seen this clue in the Sydney Morning Herald.

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