Lesson learned - get rid of fast food (8)
I believe the answer is:
takeaway
'lesson' is the definition.
Both the definition and answer are singular nouns.
Maybe they are linked in a way I don't understand?
'learned get rid of fast food' is the wordplay.
I cannot quite see how this works, but
'get' could be 'take' (taking is a kind of getting) and 'take' is found within the answer.
'food' could be 'a' (A is an example) and 'a' is found in the answer.
The remaining letters 'way' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for takeaway that I've seen before include "Type of meal" , "Remove - portable food" , "Cafe selling food to be eaten elsewhere" , "Food to go" , "Remove - portable meals" .)