Is this your crossword clue?
"irrigation" is also used as a crossword clue. If that's what you saw, the answer is often watering (8 letters).
Definitions
Supplying land with water; also flushing a body area.
Word origin
Borrowed from Middle French irrigation, from Latin irrigatio.
Used in a sentence
““My father had ideas about conservation long before the United States took it up.[…]You preserve water in times of flood and freshet to be used for power or for irrigation throughout the year. …””
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer2 curated clues
01“Field watering”10 letters
02“Watering system”10 letters
Not quite right?
"Search similar patterns."
I_________