Perform in concerts in Germany (4)
I believe the answer is:
sing
'perform' is the definition.
(to perform a song)
'in concerts in germany' is the wordplay.
'in' says the answer is hidden in the clue.
'SING' can be found hidden inside 'concerts in germany'.
(Other definitions for sing that I've seen before include "Vocalise musically" , "pipe" , "Blow the whistle" , "Celebrate" , "Chant" .)