Relating to a lot of water, I see (7)

I believe the answer is:

oceanic

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'relating to a lot' is the definition.
I can't judge whether this definition defines the answer.

'water i see' is the wordplay.
'water' becomes 'ocean' (ocean is a kind of water).
'see' becomes 'c' (the word for the letter, according to Chambers).
'ocean'+'i'+'c'='OCEANIC'

'of' acts as a link.

Can you help me to learn more?

(Other definitions for oceanic that I've seen before include "Pertaining to the sea" , "Relating to large areas of sea" , "Relating to the open seas" , "Of the open sea" , "vast waves?" .)

I've seen this clue in the Evening Standard.

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