Fellow with Turner notice fish? (8)
I believe the answer is:
flathead
'fish?' is the definition.
(I know that Flathead is a type of fish)
'fellow with turner notice' is the wordplay.
'fellow' becomes 'f' (abbreviation - of a society etc.).
'with' says to put letters next to each other.
'turner' becomes 'lathe' (a lathe is something which 'turns').
'notice' becomes 'ad' (short for advert).
'f'+'lathe'+'ad'='FLATHEAD'
(Other definitions for flathead that I've seen before include "Native American" , "simpleton" , "fish" , "dull American?" .)