Crossword Genius

Describes in detail, how second fellow got ten quid (8)

Ross

I believe the answer is:

expounds

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'describes in detail how second' is the definition.
I can't judge whether this defines the answer.

'fellow got ten quid' is the wordplay.
'fellow' becomes 'es' (I am not sure about this - if you are sure you should believe this answer much more).
'got' is an insertion indicator.
'ten' becomes 'X' (Roman numeral).
'quid' becomes 'pound' (synonyms).
'x'+'pound'='xpound'
'es' placed around 'xpound' is 'EXPOUNDS'.

Can you help me to learn more?

(Other definitions for expounds that I've seen before include "Interprets" , "Sets forth or explains in detail" .)

I've seen this clue in The Irish Times.
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