Two chaps having a laugh? (2,2)

I believe the answer is:

he-he

'a laugh?' is the definition.

'two chaps' is the wordplay.
'two chaps' means two substitutions for 'chap'.
'chap' becomes 'he'.
'chap' becomes 'he'.
'he'+'he'='HE-HE'

'having' acts as a link.

(Other definitions for he-he that I've seen before include "Sound of laughter" , "Amused expression" .)

I've seen this clue in The Times.

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