Easy to understand fury — red line's shifted (12)

I believe the answer is:

userfriendly

'easy to understand' is the definition.
(I've seen this before)

'fury red line's shifted' is the wordplay.
'shifted' indicates anagramming the letters.
'fury'+'red'+'lines'='furyredlines'
'furyredlines' is an anagram of 'USERFRIENDLY'.

(Another definition for userfriendly that I've seen is " easy to understand".)

I've seen this clue in The Times.

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