Nice bar Corelli composed is utterly resistant to harmonisation (14)

I believe the answer is:

irreconcilable

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'utterly resistant to harmonisation' is the definition.
I can't judge whether this definition defines the answer.

'nice bar corelli composed' is the wordplay.
'composed' indicates an anagram.
'nice'+'bar'+'corelli'='nicebarcorelli'
'nicebarcorelli' with letters rearranged gives 'IRRECONCILABLE'.

'is' acts as a link.

Can you help me to learn more?

(Other definitions for irreconcilable that I've seen before include "Clashing" , "Incompatible" , "Unable to agree" .)

I've seen this clue in The Times.

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