Crossword Genius

Beaver's project (3)

Ross

I believe the answer is:

dam

'beaver's project' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for dam that I've seen before include "Water retainer" , "Reservoir barrier" , "Mad as an animal mum" , "A mad animal mother" , "Flood barrier" .)

I've seen this clue in the Universal, the USA Today and The Mirror.
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