Pertaining to a treaty made by Fred Lea (7)
I believe the answer is:
federal
'pertaining to a treaty made by fred lea' is the definition.
I can't judge whether this definition defines the answer.
'made by fred lea' is the wordplay.
'made by' is an anagram indicator (another word made by the same letters).
'fred'+'lea'='fredlea'
'fredlea' anagrammed gives 'FEDERAL'.
Can you help me to learn more?
(Other definitions for federal that I've seen before include "Like the government of linked states" , "Of the state" , "Common government for a group of normally autonomous states or regions" , "Relating to a treaty" , "United" .)