Small white ball dropping behind a golf club's tree (9)
I believe the answer is:
jacaranda
'tree' is the definition.
(jacaranda is a kind of tree)
'small white ball dropping behind a golf club's' is the wordplay.
'small white ball' becomes 'jac' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'dropping behind' means to remove the last letter (the word's back or behind is dropped).
'golf club's' becomes 'randa's' (I've seen this in other clues).
'a'+'randas'='arandas'
'arandas' with its final letter taken off is 'aranda'.
'jac'+'aranda'='JACARANDA'
Can you help me to learn more?
(Other definitions for jacaranda that I've seen before include "Tropical flowering tree" , "Tropical tree with fern-like leaves" , "exotic wood" , "Tree common in Pretoria, South Africa" , "Tropical American tree" .)