Row about German predator (5)
I believe the answer is:
tiger
'predator' is the definition.
(I've seen this before)
'row about german' is the wordplay.
'row' becomes 'tier' (a tier is a row of things).
'about' is an insertion indicator.
'german' becomes 'g' (abbreviation).
'tier' going around 'g' is 'TIGER'.
(Other definitions for tiger that I've seen before include "Endangered carnivore" , "Fierce, determined type" , "Beast as Shere Khan" , "Large wildcat poetically burning bright" , "Striped big-cat" .)