Fruit dessert makers taking a Viennetta's wrapping (5)
I believe the answer is:
guava
'fruit' is the definition.
(guava is a kind of fruit)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for guava that I've seen before include "Pear-shaped tropical fruit" , "Fruit from South America" , "Large cask; tube" , "Tropical shrub bearing small yellowish fruit" , "Pale orange tropical fruit" .)