Nob oft confused and loud (4)
I believe the answer is:
toff
'nob' is the definition.
('toff' can be a synonym of 'nob')
'oft confused and loud' is the wordplay.
'confused' indicates an anagram.
'and' means one lot of letters go next to another.
'loud' becomes 'f' (A musical term).
'oft' is an anagram of 'tof'.
'tof'+'f'='TOFF'
(Other definitions for toff that I've seen before include "Posh type" , "Posh geezer" , "Person of the upper classes" , "A swell" , "Rich or upper-class person" .)