A snaky type put off one's stroke on second green (7)
I believe the answer is:
rattler
'a snaky type' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for rattler that I've seen before include "old crate" , "Poisonous American" , "excellent specimen" , "Venomous snake" , "remarkably good specimen" .)