He’ll tell you spring is here (7)
I believe the answer is:
diviner
This could be a double definition.
'he'll tell you spring' is the first definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'here' is the second definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps you can see an association between them that I don't see?
'is' is the link.
Can you help me to learn more?
(Other definitions for diviner that I've seen before include "Expert at finding liquid assets" , "more godlike" , "A soothsayer" , "More sacred" , "He finds water" .)