Crossword Genius

Football club I'll prove wrong purchasing Gakpo ultimately (9)

Ross

I believe the answer is:

liverpool

I'm a little stuck... Click here to teach me more about this clue!

'football club' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.

'i'll prove wrong purchasing gakpo ultimately' is the wordplay.
'wrong' indicates anagramming the letters.
'purchasing' means one lot of letters goes inside another (some letters take possession of others).
'ultimately' indicates one should take the final letters.
The last letter of 'gakpo' is 'o'.
'ill'+'prove'='illprove'
'illprove' is an anagram of 'liverpol'.
'liverpol' enclosing 'o' is 'LIVERPOOL'.

Can you help me to learn more?

(Other definitions for liverpool that I've seen before include "I over poll the English city" , "Merseyside port" , "Cathedral city" , "City in northwestern England" , "Merseyside city of The Beatles" .)

I've seen this clue in The Telegraph.
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