Crime award inspiring small informal gathering (4-4)

I believe the answer is:

sing-song

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'informal gathering' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'crime award inspiring small' is the wordplay.
'crime' becomes 'sin'.
'award' becomes 'gong' (I've seen this before).
'inspiring' means one lot of letters goes inside another.
'small' becomes 's' (abbreviation - e.g. clothes size).
'gong' enclosing 's' is 'gsong'.
'sin'+'gsong'='SING-SONG'

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I've seen this clue in The Guardian.

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