Row about finally trapping wild cat (5)
I believe the answer is:
tiger
'wild cat' is the definition.
(I've seen this before)
'row about finally trapping' is the wordplay.
'row' becomes 'tier' (tier is a kind of row**).
'about' is an insertion indicator.
'finally' indicates one should take the final letters.
The last letter of 'trapping' is 'g'.
'tier' going around 'g' is 'TIGER'.
(Other definitions for tiger that I've seen before include "Large forest cat" , "One noted for stripes" , "See 13" , "Formidable opponent" , "Large cat with black stripes" .)