In Berlin Germans hang around (6)
I believe the answer is:
'hang around' is the definition.
('linger' can be a synonym of 'hang around')
'in berlin germans' is the wordplay.
'in' says the answer is hidden in the clue.
'LINGER' can be found hidden inside 'berlin germans'.
(Other definitions for linger that I've seen before include "Leave slowly and hesitantly" , "Stay on as if reluctant to leave" , "Delay departure" , "Remain behind" , "Be slow to go" .)