Crossword Genius

Holes apt to be wet at the bottom (5)

Ross

I believe the answer is:

wells

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'holes' is the definition.
The answer and definition can be both man-made objects as well as being plural nouns.
Maybe they are linked in a way I don't understand?

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for wells that I've seen before include "H.G. - - , writer" , "H. G. . . . . ., science-fiction writer" , "Cathedral city; sci-fi writer" , "Flows upward; small city" , "Somerset cathedral city" .)

I've seen this clue in the Evening Standard.
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