Thoreau's gag! Fell about in fits of giggles! (5,2,8)
I believe the answer is:
gales of laughter
'fits of giggles' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.
'thoreau's gag fell about' is the wordplay.
'about' indicates an anagram.
'thoreaus'+'gag'+'fell'='thoreausgagfell'
'thoreausgagfell' with letters rearranged gives 'GALES OF LAUGHTER'.
'in' is the link.
Can you help me to learn more?
I've seen this clue in The Independent.
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