American fuel product of practical value (6)
I believe the answer is:
useful
'american fuel product of practical value' is the definition.
I can't judge whether this defines the answer.
'american fuel' is the wordplay.
I cannot quite understand how this works, but
'american' could be 'us' (United States) and 'us' is present in the answer.
an anagram of 'fuel' is 'eful' which is within the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for useful that I've seen before include "Handy, serviceable" , "Practical and functional" , "Handy, practical" , "Handy; very able" , "Utilitarian" .)