Sloth circling around berry (4)
I believe the answer is:
acai
'berry' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.
'sloth circling around' is the wordplay.
'sloth' becomes 'ai' (ai is a kind of sloth).
'circling' is an insertion indicator (circling can mean going around or containing).
'around' becomes 'ca' (circa).
'ai' going around 'ca' is 'ACAI'.
Can you help me to learn more?
(Other definitions for acai that I've seen before include "fruit which is nutritious" , "South American palm tree" , "something nutritional to eat" , "South American food product" .)