A German boss? (7)

I believe the answer is:

manager

I'm a little stuck... Click here to teach me more about this clue!

'boss?' is the definition.
(I know this)

'a german' is the wordplay.
'a german' anagrams to 'MANAGER'.
But, I'm unsure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for manager that I've seen before include "One running a shop, industry etc" , "Ran game (anag.)" , "Boss" , "Person in charge of staff" , "executive position" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app