Newsman inside favouring a hat (6)
I believe the answer is:
fedora
'hat' is the definition.
(I know that fedora is a type of hat)
'newsman inside favouring a' is the wordplay.
'newsman' becomes 'ed' (short for editor).
'inside' means one lot of letters goes inside another.
'favouring' becomes 'for' (I've seen this before).
'ed' inserted into 'for' is 'fedor'.
'fedor'+'a'='FEDORA'
(Other definitions for fedora that I've seen before include "Felt hat with a creased crown" , "Style of hat" , "Felt hat dented lengthways" , "Headgear" , "top fashion" .)