Enthusiast upset one in Germany getting to adjust a radio? (4,2)
I believe the answer is:
tune in
'adjust a radio?' is the definition.
I can't judge whether this defines the answer.
'enthusiast upset one in germany getting' is the wordplay.
'enthusiast' becomes 'nut' (nut can mean an enthusiast or fan).
'upset' says the letters should be written in reverse.
'one in germany' becomes 'ein' ('one' in German).
'getting' means one lot of letters go next to another.
'nut' reversed gives 'tun'.
'tun'+'ein'='TUNE IN'
'to' is the link.
Can you help me to learn more?
(Other definitions for tune in that I've seen before include "Set radio to the right wavelength" , "Switch on" , "Watch or listen (to a broadcast)" .)