The most common and most likely answer to this crossword clue is the 10 plus 5 letter word ARCHIMEDES SCREW
I've seen this crossword clue in The Guardian
A
R
C
H
I
M
E
D
E
S
S
C
R
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W
More clues leading to the result ARCHIMEDES SCREW
Buddy explains!
The straight part
We know that "Water brought up by this" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case water brought up by this = archimedes screw.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.