He's smart to order pets (8)
I believe the answer is:
hamsters
'pets' is the definition.
The answer and definition can be both animals as well as being plural nouns.
Maybe they are linked in a way I don't understand?
'he's smart to order' is the wordplay.
'to order' is an anagram indicator.
'hes'+'smart'='hessmart'
'hessmart' is an anagram of 'HAMSTERS'.
Can you help me to learn more?
(Other definitions for hamsters that I've seen before include "Small rodents often kept as pets" , "Mouse-like pets with cheekpouches" , "He's smart, like rodent pets" , "Small rodents with cheek-pouches, often pets" , "Rodents with large cheek-pouches" .)