Change/replace pet cloth and do the regular morning job (7,3,5)

'changereplace pet cloth' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.

'do the regular morning job' is the wordplay.
I cannot quite see how this works, but
'do' could be 'ape' (both can mean to impersonate) and 'ape' is present in the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is located in the answer.
This explanation may well be incorrect...

'and' acts as a link.

Can you help me to learn more?