Alluvial

3 clues
Kind of deposit
Like soil in a delta
Caused by or benefiting from flooding
Similar answers:
Allude
Alluded
Alludedto
Alludes
Alludesto
Alludeto
Alluding
Allunattended
Allunderoneroof
Allup
Allupset
Allure
Allured
Allurer
Allures
Allureusweekly
Alluring
Allusion
Allusions
Allusive