On paper, maybe, they're dangerous beasts (6)
I believe the answer is:
tigers
'beasts' is the definition.
(I have seen 'Striped beasts ' mean 'tigers' so perhaps 'beasts' could also mean 'tigers')
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for tigers that I've seen before include "Large forest felines" , "strong economies" , "Large striped felines" , "Striped beasts" , "Large felines of forests" .)