German accent (6)
I believe the answer is:
umlaut
'german accent' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for umlaut that I've seen before include "Mark over some vowels (in, eg, German)" , "Two dots put over a vowel in German" , "In German, written mark indicating change in vowel pronunciation" , "Diacritical mark (two dots) placed over a vowel in German to indicate a change in sound" , "Mark over some German letters" .)