Thug putting fur back - loud man (7)
I believe the answer is:
ruffian
'thug' is the definition.
(I've seen this in another clue)
'fur back loud man' is the wordplay.
'back' says the letters should be written backwards.
'loud' becomes 'f' (short for forte - 'loud' in music).
'man' becomes 'ian' (man's name).
'fur' written backwards gives 'ruf'.
'ruf'+'f'+'ian'='RUFFIAN'
'putting' is the link.
(Other definitions for ruffian that I've seen before include "Rowdy" , "Hooligan" , "Aggressive, rude troublemaker" , "Violent criminal" , "Funfair (anag)" .)