Seemed to be editor on a paper of some kind (8)
I believe the answer is:
appeared
'seemed' is the definition.
('appear' can be a synonym of 'seem')
'editor on a paper of some kind' is the wordplay.
'editor' becomes 'ed' (abbreviation).
'on' says to put letters next to each other.
'of some' says to take the initial letters (I've seen 'some' mean this).
'kind' becomes 'pear' (I can't explain this - if you can you should give a lot more credence to this answer).
The initial letter of 'paper' is 'p'.
'a'+'p'+'pear'='appear'
'ed' put after 'appear' is 'APPEARED'.
'to be' is the link.
Can you help me to learn more?
(Other definitions for appeared that I've seen before include "Seemed - performed - emerged" , "published" , "Came into sight" , "Seemed - came into view" , "Turned up" .)