Strong wind will rush mostly on island, getting stick (9)
I believe the answer is:
hurricane
'strong wind' is the definition.
(I've seen this before)
'rush mostly on island getting stick' is the wordplay.
'rush' becomes 'hurry' (synonyms).
'mostly' means to remove the last letter (most but not all of the word).
'on island getting' becomes 'i' (I can't explain this - if you can you should give a lot more credence to this answer).
'stick' becomes 'cane' (cane is a kind of stick).
'hurry' with its final letter taken off is 'hurr'.
'hurr'+'i'+'cane'='HURRICANE'
'will' acts as a link.
Can you help me to learn more?
(Other definitions for hurricane that I've seen before include "Strong wind" , "Plane once" , "Big blow?" , "commotion" , "Tropical cyclone - WWII fighter" .)