Britpop band extremely rowdy, lacking focus (6)

I believe the answer is:

blurry

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'focus' is the definition.
(thesaurus)

'britpop band extremely rowdy lacking' is the wordplay.
I cannot quite see how this works, but
'band' could be 'blur' (English band) and 'blur' is present in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for blurry that I've seen before include "Unfocussed" , "Indistinct" , "Unfocused" .)

I've seen this clue in The Times.

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