Crossword Genius

Chap's giggling -- this could make one corpse (12)

Ross

I believe the answer is:

manslaughter

'this could make one corpse' is the definition.
(killing somebody)

'chap's giggling' is the wordplay.
'chap's' becomes 'man's' (chap can mean a man).
'giggling' becomes 'laughter'.
'mans'+'laughter'='MANSLAUGHTER'

(Other definitions for manslaughter that I've seen before include "charge?" , "Crime of killing, short of murder" , "slaying" , "Unlawful killing" , "Crime of unpremeditated killing" .)

I've seen this clue in The Telegraph.
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