For example, going back and forth grappling with cooking ingredient (3,5)
I believe the answer is:
egg white
'ingredient' is the definition.
(egg white is a kind of ingredient)
'for example going back and forth' is the wordplay.
'for example' becomes 'e.g.' (short for 'exempli gratia', 'for example' in Latin).
'back' says to take the final letters (the letter at the back).
'and' says to put letters next to each other.
'forth' becomes 'white' (I can't justify this - if you can you should give a lot more credence to this answer).
The last letter of 'going' is 'g'.
'eg'+'g'+'white'='EGG-WHITE'
'grappling with cooking' acts as a link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for egg white that I've seen before include "Albumen, not the yolk" , "Cake ingredient" , "Albumen, transparent ovum content" , "Meringue ingredient" .)