All the work of Dickens, never a week off (4-5)

'all' is the definition.
Both the answer and definition are adjectives. Maybe there's a link between them I don't understand?

'work of dickens never a week off' is the wordplay.
I cannot quite understand how this works, but
'of' could be 'o' and 'o' is found within the answer.
'work' could be 'run' (both can mean to operate something) and 'run' is present in the remaining letters.
'a' is found in the answer.
The remaining letters 'yerd' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

'the' is the link.

Can you help me to learn more?