Arranged lousy rise? Are you sure? (9)

I believe the answer is:

seriously

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'you sure?' is the definition.
I can't tell whether this definition defines the answer.

'arranged lousy rise?' is the wordplay.
'arranged' indicates anagramming the letters (letters rearranged).
'lousy'+'rise'='lousyrise'
'lousyrise' is an anagram of 'SERIOUSLY'.

'are' is the link.

Can you help me to learn more?

(Other definitions for seriously that I've seen before include "In a solemn and thoughtful manner" , "Gravely" .)

I've seen this clue in The Daily Express.

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