A crass male, nastily gibing (7)

I believe the answer is:

sarcasm

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'a crass male nastily gibing' is the definition.
I can't judge whether this definition defines the answer.

'a crass male nastily' is the wordplay.
'male' becomes 'm' (common abbreviation).
'nastily' indicates anagramming the letters.
'a'+'crass'+'m'='acrassm'
'acrassm' with letters rearranged gives 'SARCASM'.

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(Other definitions for sarcasm that I've seen before include "Caustic remark" , "Ironic wit" , "Mocking words intended to insult" , "Ironical remark or taunt" , "Caustic remarks" .)

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

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