The sound of water - didn't I tell you so! (3)

I believe the answer is:

see

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'didn't i tell you so' is the definition.
I can't tell whether this defines the answer.

'the sound of water' is the wordplay.
'the sound of' indicates a 'sounds like' (homophone) clue.
'water' becomes 'sea' (the sea is water).
'sea' sounds like 'SEE'.

Can you help me to learn more?

(Other definitions for see that I've seen before include "date" , "Rome, notably" , "around cathedral" , "Perceive, watch" , "Observe - diocese" .)

I've seen this clue in the Evening Standard.

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