Newspaper and Fashion magazine form a nucleus, perhaps (9)
I believe the answer is:
organelle
'a nucleus perhaps' is the definition.
(nucleus is a kind of organelle)
'newspaper and fashion magazine' is the wordplay.
'newspaper' becomes 'organ' (I've seen this before).
'and' is a charade indicator (letters next to each other).
'fashion magazine' becomes 'elle' (I can't explain this - if you can you should give a lot more credence to this answer).
'organ'+'elle'='ORGANELLE'
'form' is the link.
This may not be correct. It may be part of another bit of the clue.
Can you help me to learn more?
(Another definition for organelle that I've seen is " Specialised part of a cell".)