Raging king of the insect world? (6,7)
I believe the answer is:
purple emperor
'world?' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
'raging king of the insect' is the wordplay.
'raging king of' becomes 'purple' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'the insect' becomes 'emperor' (emperor is a kind of insect).
'purple'+'emperor'='PURPLE EMPEROR'
Can you help me to learn more?
(Other definitions for purple emperor that I've seen before include "One flapping about" , "Flyer" , "European butterfly" , "Insect" , "Butterfly (appropriately coloured)" .)