Gutless gringo and tough old German (4)
I believe the answer is:
goth
'old german' is the definition.
(the Goths were an ancient Germanic people)
'gutless gringo and tough' is the wordplay.
'gutless' suggests removing the centre.
'and' is a charade indicator (letters next to each other).
'tough' becomes 'th' (I am not sure about this - if you are sure you should believe this answer much more).
'gringo' with its centre taken out is 'go'.
'go'+'th'='GOTH'
Can you help me to learn more?
(Other definitions for goth that I've seen before include "Fan of gloomy music" , "Rock music with gloomy lyrics" , "Old invader" , "Uncivilised type" , "One of Alaric's people" .)