Kettle blew up — ultimately going off fine dining (6,4)
I believe the answer is:
cordon bleu
'fine dining' is the definition.
(cordon bleu describes excellent food)
'kettle blew up ultimately going off' is the wordplay.
I cannot really see how this works, but
'kettle' could be 'cordon' (kettling is a method of cordoning used by police) and 'cordon' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
(Other definitions for cordon bleu that I've seen before include "Of a very high standard (food)" , "High class chef" , "distinguished chef" , "Highest class (cooking)" , "High-class cookery" .)