The answer to the clue “deel van een waterrad” (part of a water wheel) with 6 letters is SCHOEP (blade).
This is because “schoep” is the Dutch word for “blade” and specifically refers to the flat, angled panels attached to the rim of a water wheel that catch the water’s current to rotate the wheel.
Here are some additional clues that could help you solve this cryptogram:
Hint: Water catches these to turn the mill.
Hint: They capture the power of the river.
Hint: Many of them work together to make the wheel turn.