Rock band founded in London in 1989 as Seymour (4)

I believe the answer is:

blur

(Other definitions for blur that I've seen before include "Haze - obscure" , "Hazy or indistinct image" , "Out-of-focus sight" , "Go out of focus" , "This Brit-pop band is a bit hazy" .)

I've seen this clue in The Independent.

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