Unusual throne with six legs (6)

I believe the answer is:

hornet

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'with six legs' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.

'unusual throne' is the wordplay.
'unusual' indicates anagramming the letters.
'throne' is an anagram of 'HORNET'.

Can you help me to learn more?

(Other definitions for hornet that I've seen before include "A large wasp with serious sting" , "Stingy type" , "Large stinging wasp" , "Run through" , "Stinging insect" .)

I've seen this clue in the Evening Standard.

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