Blur and Oasis, Britpop founders, could alienate the establishment at the outset when touring America (9)

I believe the answer is:

obfuscate

'blur' is the definition.
(both can mean to make more confusing)

I cannot understand how the rest of the clue works.

(Other definitions for obfuscate that I've seen before include "Darken - bewilder" , "Perplex" , "Darken or obscure something" , "Make unintelligible" , "Hide" .)

I've seen this clue in The Guardian.

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