Row about grand creature of the forests (5)
I believe the answer is:
tiger
'creature of the forests' is the definition.
'tiger' can be an answer for 'creature' (tiger is a type of animal). I'm not certain of the 'of the forests' bit.
'row about grand' is the wordplay.
'row' becomes 'tier' (a tier is a row of things).
'about' indicates putting letters inside.
'grand' becomes 'g' (G is short for grand as in a thousand).
'tier' enclosing 'g' is 'TIGER'.
Can you help me to learn more?
(Other definitions for tiger that I've seen before include "Large striped cat" , "Formidable opponent" , "One noted for stripes" , "Carnivorous large cat" , "___ Woods, golfer" .)