Buckle up now dude or get hurt! (7)
I believe the answer is:
wounded
'hurt' is the definition.
(I know that hurt can be written as wounded)
'buckle up now dude or' is the wordplay.
'now dude' can be anagrammed to 'WOUNDED'.
But, I am not clear how the anagram is indicated.
'get' acts as a link.
Can you help me to learn more?
(Other definitions for wounded that I've seen before include "Suffering from injury" , "Injured in battle" , "Caused injury" , "Hurt" .)