Throne constructed for an insect (6)
I believe the answer is:
hornet
'for an insect' is the definition.
(hornet is a kind of insect)
'throne constructed' is the wordplay.
'constructed' indicates an anagram.
'throne' anagrammed gives 'HORNET'.
(Other definitions for hornet that I've seen before include "Large wasp with vicious sting" , "Throne for a kind of wasp" , "Stingy type" , "Troublesome nester" , "Large social wasp with fierce sting" .)