Friends say water's rising all around in the usual way (2,2,5)
I believe the answer is:
as it comes
'the usual way' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'friends say water's rising all around' is the wordplay.
'friends say' becomes 'sitcom' (Friends is an example).
'water' becomes 'sea' (the sea is water).
'rising' is a reversal indicator (going up in a down clue).
'all around' means one lot of letters goes inside another.
'sea' written backwards gives 'aes'.
'sitcom' placed into 'aes' is 'AS IT COMES'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for as it comes that I've seen before include "the way it's made" , "in no particular order" , "however produced" .)