Somehow trace an alternative producer ... (7)
I believe the answer is:
creator
'producer' is the definition.
(I've seen this in another clue)
'somehow trace an alternative' is the wordplay.
'somehow' indicates an anagram.
'an alternative' becomes 'or' ().
'trace' anagrammed gives 'creat'.
'creat'+'or'='CREATOR'
(Other definitions for creator that I've seen before include "Inventor" , "The Almighty" , "Maker" , "Originator - God" , "Person who makes or invents things" .)