Some pseudonym as the adopted title? (8)
I believe the answer is:
masthead
'title?' is the definition.
(I know that masthead is a type of title)
'some pseudonym as the adopted' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'MASTHEAD' is hidden within 'pseudonym as the adopted'.
(Other definitions for masthead that I've seen before include "Something in large type" , "Big name appears here" , "Telegraph, perhaps" , "Printed newspaper details" , "Newspaper identity" .)