Bad gag about a German getting past its best? (6)
I believe the answer is:
ageing
'past its best?' is the definition.
I can't judge whether this definition defines the answer.
'bad gag about a german' is the wordplay.
'bad' indicates anagramming the letters.
'about' indicates putting letters inside.
'a german' becomes 'ein' ('a' in German).
'gag' anagrammed gives 'agg'.
'agg' placed around 'ein' is 'AGEING'.
'getting' acts as a link.
Can you help me to learn more?
(Other definitions for ageing that I've seen before include "getting more advanced?" , "Growing older" , "Getting old" , "Declining" , "Elderly" .)