Splashing American, swimmer from Mississippi? (7,7)

I believe the answer is:

jackson pollock

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'mississippi?' is the definition.
I know nothing about this answer so I can't tell whether this works.

'splashing american swimmer' is the wordplay.
'splashing american' becomes 'jackson' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'swimmer' becomes 'pollock' (type of fish).
'jackson'+'pollock'='JACKSON POLLOCK'

'from' acts as a link.

Can you help me to learn more?

(Another definition for jackson pollock that I've seen is " American painter, 1912-56".)

I've seen this clue in The Times.

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