Flatulence can be a delightful thing (3)
I believe the answer is:
gas
This clue is a double definition.
'flatulence' is the first definition.
(flatulence is gas from the body)
'a delightful thing' is the second definition.
(informal term for an amusing thing)
'can be' acts as a link.
(Other definitions for gas that I've seen before include "Eg, oxygen" , "Hydrogen or oxygen, say" , "could be embarrassing for American" , "Gossip" , "Neon, for example" .)