Writer of panache newspaper advanced (4)
I believe the answer is:
biro
'writer' is the definition.
(I've seen this before)
'panache newspaper advanced' is the wordplay.
I cannot quite understand how this works, but
'newspaper' could be 'i' (UK newspaper) and 'i' is located in the answer.
The remaining letters 'bro' is a valid word which might be clued in a way I don't understand.
This may be the basis of clue (or it may be nonsense).
'of' is the link.
(Other definitions for biro that I've seen before include "Lazlo -, ballpoint pen inventor" , "Laszlo Jozsef -, ballpoint pen inventor" , "Pocket item" , "writer" , "Writing implement" .)