UNESCO transported wild cats (6)
I believe the answer is:
ounces
'wild cats' is the definition.
'ounces' can be an answer for 'cats' (I have seen 'Undomesticated cats' mean 'ounces' so perhaps 'cats' could also mean 'ounces'). I'm not sure about the 'wild' bit.
'unesco transported' is the wordplay.
'transported' indicates anagramming the letters.
'unesco' is an anagram of 'OUNCES'.
Can you help me to learn more?
(Other definitions for ounces that I've seen before include "Twelfths of a pound" , "Undomesticated cats" , "More than one cat" , "Small weights in UNESCO" , "There are16 to the pound" .)