Bliss in happy house rising river devours (8)

I believe the answer is:

euphoria

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'bliss' is the definition.
(I've seen this in another clue)

'happy house rising river devours' is the wordplay.
'happy' becomes 'up' (I've seen this in other clues).
'house rising' becomes 'eho' (I can't justify this - if you can you should believe this answer much more).
'river' becomes 'ria'.
'devours' is an insertion indicator (inserted letters are devoured).
'eho'+'ria'='ehoria'
'up' going within 'ehoria' is 'EUPHORIA'.

'in' acts as a link.

Can you help me to learn more?

(Other definitions for euphoria that I've seen before include "Ecstatic feeling" , "Intense feeling of happiness" , "In high spirits" , "Feeling of great elation and joy" , "Jubilation" .)

I've seen this clue in The Sun.

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