Rain dance from animated cartoon - The Fruit of the Greenhouse (6)
I believe the answer is:
Here is my best explanation:
'fruit of the greenhouse' is the definition.
'tomato' can be an answer for 'fruit' (I've seen this before). I am not sure about the 'of the greenhouse' bit.
I don't understand the remainder of the clue.
(Other definitions for tomato that I've seen before include "Fruit-vegetable", "A motto turned out to be fruit or veg", "Pulpy edible fruit", "Fruit used in salads", "It used to be call a love-apple", "Shiny red fruit", "Love apple (or "beef" fruit?)", "It's also known as a love apple", "Red fruit eaten as veg" and "Also called the love apple".)