Forgiving fast about a German turning (7)
I believe the answer is:
lenient
'forgiving' is the definition.
(thesaurus)
'fast about a german turning' is the wordplay.
'fast' becomes 'lent' (Lent is a period of fasting in Christianity).
'about' indicates putting letters inside.
'a german' becomes 'ein' ('a' in German).
'turning' is a reversal indicator.
'ein' in reverse letter order is 'nie'.
'lent' placed around 'nie' is 'LENIENT'.
(Other definitions for lenient that I've seen before include "Inclined to let people off lightly" , "Forbearing" , "Tolerant, rather than strict" , "Clement" , "Soft on the rules" .)