German in charge of new control (6)
I believe the answer is:
govern
'control' is the definition.
(to govern is to control or rule over)
'german in charge of new' is the wordplay.
'german' becomes 'g' (abbreviation).
'in charge of' becomes 'over' (I've seen this in another clue).
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'g'+'over'+'n'='GOVERN'
(Other definitions for govern that I've seen before include "Rule or administer" , "Manage - control" , "'Rule over, control (6)'" , "Control, influence" , "Rule over or regulate" .)