Flat fare includes fuel on return journey between borders of Libya and Nigeria (7)
I believe the answer is:
lasagna
'journey between borders of libya and nigeria' is the definition.
I can't tell whether this definition defines the answer.
'flat fare includes fuel on return' is the wordplay.
'flat fare' becomes 'anal' (I can't explain this - if you can you should believe this answer much more).
'includes' means one lot of letters goes inside another.
'fuel' becomes 'gas' (gas is a kind of fuel).
'on return' says the letters should be written backwards.
'anal' placed around 'gas' is 'angasal'.
'angasal' back-to-front is 'LASAGNA'.
Can you help me to learn more?
(Other definitions for lasagna that I've seen before include "pasta's provided" , "Italian cooking" , "Calorie-rich food" , "Italian dish" , "Baked pasta dish" .)