Good reason to get your skates on? (4)
I believe the answer is:
rink
'good' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for rink that I've seen before include "Ice-skating venue" , "Ice hockey floor" , "Skating venue" , "Place to skate" , "frozen surface" .)