Old German coin (5)
'old german coin' is the definition.
(I've seen this in another clue)
This is all the clue.
'old german coin' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for pfennig that I've seen before include "Approximately two point two zero five pounds" , "Former German currency unit" , "old rhino" , "foreign coin" , "Hundredth of an old Deutschmark" .)