Means to convey fuel policy after tweet (8)
I believe the answer is:
pipeline
'means to convey fuel' is the definition.
I can't judge whether this definition defines the answer.
'policy after tweet' is the wordplay.
'policy' becomes 'line' (the party line is a party's policy on something).
'after' is a charade indicator (letters next to each other).
'tweet' becomes 'pipe' (both can mean to make a high-pitched sound).
'line' put after 'pipe' is 'PIPELINE'.
Can you help me to learn more?
(Other definitions for pipeline that I've seen before include "From oil transporter" , "Means of transporting water oil and gas" .)