A German gets organised, employing a theatrical supervisor (5,7)
I believe the answer is:
stage manager
'theatrical supervisor' is the definition.
(I've seen this before)
'a german gets organised employing a' is the wordplay.
'organised' indicates anagramming the letters.
'employing' indicates putting letters inside.
'a'+'german'+'gets'='agermangets'
'agermangets' anagrammed gives 'stagemanger'.
'stagemanger' placed around 'a' is 'STAGE-MANAGER'.
(Other definitions for stage manager that I've seen before include "Technical head (for a play)" , "One with important theatrical role" , "Theatre's technical head" , "One in charge of theatre production" , "Supervisor in theatrical production" .)