Chewing gum ingredient (6)
I believe the answer is:
chicle
'chewing gum ingredient' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for chicle that I've seen before include "Some of something to chew" , "sapodilla gum" , "Milky juice of tropical tree used in chewing gum" , "Cliche about tropical juice used to make chewing gum" .)