Forgetting name of out-of-date Asian cooking ingredient (10)
'cooking ingredient' is the definition.
(type of gum used in cooking)
'forgetting name of out-of-date asian' is the wordplay.
I cannot quite understand how this works, but
'name' could be 'ida' and 'ida' is found in the answer.
'of' could be 'o' and 'o' is found within the answer.
This may be the basis of clue (or it may be nonsense).
(Other definitions for asafoetida that I've seen before include "Gum", "it creates a stink", "Smelly plant", "Indian ingredient", "Fragrant plant".)