It provides excitement say in spring (6)
I believe the answer is:
source
'spring' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for source that I've seen before include "Beginning to add" , "Origin; spring" , "'Origin, root (6)'" , "Fountainhead - journalist's informant" , "From which something springs" .)