Insult perplexes underworld in brief (5,5)

I believe the answer is:

throw shade

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

'perplexes underworld in brief' is the wordplay.
'perplexes' becomes 'throws' ('throw' can be a synonym of 'perplex').
'underworld in brief' becomes 'hade' (I can't justify this - if you can you should believe this answer much more).
'throws'+'hade'='THROW SHADE'

Can you help me to learn more?

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

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