This hood doesn't last for ever (3)
I believe the answer is:
boy
'this hood doesn't last for ever' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
This is all the clue.
Can you help me to learn more?
(Other definitions for boy that I've seen before include "Lad" , "Male child" , "Youth" , "Young man" , "Young male" .)