The endless brooks provide excitement (7)
I believe the answer is:
thrills
'excitement' is the definition.
(I know this)
'the endless brooks' is the wordplay.
'endless' means to remove the last letter.
'brooks' becomes 'rills' (I've seen this in another clue).
'the' with its last letter taken away is 'th'.
'th'+'rills'='THRILLS'
'provide' is the link.
(Other definitions for thrills that I've seen before include "Hair-raising experiences" , "Excitement" , "Exciting sensations" , "Excites" , "Delights" .)