Irrigates

4 clues
Waters
Waters fields
Wets; moistens
Floods on purpose
Similar answers:
Abnegates
Abrogates
Agates
Aggregates
Airrifle
Airrifles
Airrights
Andgates
Arrivalgates
Bestirring
Billgates
Bullgates
Castigates
Castlegates
Causeirritation
Cirri
Clintonandgates
Colgates
Conestogatesters
Counterirritant