AFLW sides lost? I sulk and get angry (4,3)

I believe the answer is:

flip out

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'aflw sides lost? i' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'sulk and get angry' is the wordplay.
'sulk' becomes 'out' (I can't explain this - if you can you should believe this answer much more).
'and' means one lot of letters go next to another.
'get angry' becomes 'flip' (I've seen this before).
'out' put after 'flip' is 'FLIP OUT'.

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

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