Farm work provides married man with endless cereal (9)
I believe the answer is:
husbandry
'farm work provides married' is the definition.
I can't judge whether this defines the answer.
'man with endless cereal' is the wordplay.
'man with' becomes 'husband' (someone's man could mean their husband. I am not sure about the 'with' bit.).
'endless' means to remove the last letter.
'cereal' becomes 'rye' (rye is a kind of cereal).
'rye' with its last letter taken away is 'ry'.
'husband'+'ry'='HUSBANDRY'
Can you help me to learn more?
(Other definitions for husbandry that I've seen before include "The business of farming" , "farm management" , "farming task" , "land management" , "Farm business" .)