Broadcast of Grieg's more confused (7)

I believe the answer is:

foggier

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'more confused' is the definition.
Both the definition and answer are comparative adjectives. Perhaps you can see a link between them that I don't see?

'broadcast of grieg's' is the wordplay.
'broadcast' is an anagram indicator (letters scattered or cast around).
'of'+'grieg'='ofgrieg'
'ofgrieg' with letters rearranged gives 'FOGGIER'.

Can you help me to learn more?

(Another definition for foggier that I've seen is " increasingly steamy".)

I've seen this clue in The Daily Mail.

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