You can't eat this in Ethiopian capital - return the offer to the French (8)
I believe the answer is:
inedible
'you can't eat this in ethiopian capital return the offer to the french' is the definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?
'in ethiopian capital return the offer to the french' is the wordplay.
'capital' says to take the initial letters.
'return' says the letters should be written in reverse.
'the offer' becomes 'bid' (bid is a kind of offer).
'to the french' becomes 'le' ('the' in French).
The initial letter of 'ethiopian' is 'e'.
'bid' written backwards gives 'dib'.
'in'+'e'+'dib'+'le'='INEDIBLE'
Can you help me to learn more?
(Other definitions for inedible that I've seen before include "Awful to taste" , "Not fit for consumption" , "Uneatable" , "unfit for course!" , "Unpalatable" .)