Woodstock's buddy (6)
I believe the answer is:
snoopy
'woodstock's buddy' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for snoopy that I've seen before include "Brown dog's" , "Prying, as in Peanuts" , "Curious" , "Cartoon character" , "Cartoon beagle" .)