Country fellow’s work in garden including digging at the margins (5)
I believe the answer is:
hodge
'including digging at the margins' is the definition.
I can't tell whether this definition defines the answer.
'country fellow's work in garden' is the wordplay.
'country fellow's work' becomes 'dg' (I can't justify this - if you can you should believe this answer much more).
'in' is an insertion indicator.
'garden' becomes 'hoe' (to garden could mean to hoe).
'dg' placed within 'hoe' is 'HODGE'.
Can you help me to learn more?
(Another definition for hodge that I've seen is " CAT".)