Plenty of opium lies oddly discarded, after being split up (8)

I believe the answer is:

opulence

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'plenty' is the definition.
(I've seen this before)

'of opium lies oddly discarded after being split up' is the wordplay.
'of' becomes 'o''.
'oddly discarded' indicates alternate letters (letters in odd-numbered positions removed).
'after' means one lot of letters go next to another.
'being split up' becomes 'nce' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'opium'+'lies'='opiumlies'
The alternating letters of 'opiumlies' are 'pule'.
'o'+'pule'+'nce'='OPULENCE'

Can you help me to learn more?

(Other definitions for opulence that I've seen before include "wealth is manifest" , "Plenty" , "State of wealth or abundance" , "Means" , "Rich quality" .)

I've seen this clue in The Independent.

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