As time allows in a good day, before and after hours (3-7)

'as time allows' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'a good day before and after hours' is the wordplay.
I cannot really understand how this works, but
'a' is within the answer.
'good' could be 'g' (abbreviation) and 'g' is found in the answer.
'day' could be 'd' (abbreviation for day) and 'd' is present in the answer.
'before' could be 'e' (I've seen this in other clues) and 'e' is found within the answer.
'after hours' could be 'late' (I've seen this in another clue) and 'late' is found in the answer.
The remaining letters 're' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

'in' is the link.

Can you help me to learn more?