Sample of the smoothie embraced by Maria Callas makes a comeback (4)
I believe the answer is:
acai
'sample of the smoothie' is the definition.
I don't know anything about this answer so I cannot tell whether this works.
'embraced by maria callas makes a comeback' is the wordplay.
'embraced by' indicates the answer is hidden within the clue (surrounding letters embrace the answer).
'makes a comeback' is a reversal indicator (I've seen 'making a comeback' mean this).
'iaca' is hidden within 'maria callas'.
'iaca' backwards is 'ACAI'.
Can you help me to learn more?
(Other definitions for acai that I've seen before include "South American food product" , "South American palm tree" , "fruit which is nutritious" , "something nutritional to eat" .)