Animals in pounds (6)
I believe the answer is:
ounces
This clue could be a double definition.
'animals' is the first definition.
(I've seen this before)
'pounds' is the second definition.
The answer and definition can be both quantities as well as being plural nouns.
Maybe you can see an association between them that I can't see?
'in' acts as a link.
Can you help me to learn more?
(Other definitions for ounces that I've seen before include "There are 12 in a pound" , "Small weights in UNESCO" , "less than a pound?" , "Imperial weights" , "Imperial measures of weight" .)