Charge fellow spreading faeces for pig (4,4,4)

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

'charge fellow spreading faeces' is the wordplay.
I cannot quite understand how this works, but
'charge' could be 'fee' (fee is a kind of charge) and 'fee' is present in the answer.
'fellow' could be 'don' (both can mean an academic) and 'don' is located in the answer.
an anagram of 'faeces' is 'esface' which is located in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).

'for' is the link.

Can you help me to learn more?