Imagine writer being one of these Scousers! (3,3,4)

'these scousers' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'imagine writer being one' is the wordplay.
I cannot really see how this works, but
'one' could be 'the' (both can introduce a definite example of something) and 'the' is located in the answer.
The remaining letters 'fabfour' 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).

'of' is the link.

Can you help me to learn more?