Angry in general staff cancellations (9)

I believe the answer is:

crossings

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'cancellations' is the definition.
The definition and answer can be both acts as well as being plural nouns.
Maybe they are linked in a way I don't understand?

'angry in general staff' is the wordplay.
'angry' becomes 'cross' (cross can mean annoyed or angry).
'general staff' becomes 'gs' (this might be a standard abbreviation I've not previously seen).
'cross'+'in'+'gs'='CROSSINGS'

Can you help me to learn more?

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

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