Control new course of stream (6)
I believe the answer is:
master
'control new course' is the definition.
'master' can be an answer for 'control' (synonyms). I am unsure of the 'new course' bit.
'of stream' is the wordplay.
'of' indicates an anagram (the answer comes from or 'of' the letters).
'stream' is an anagram of 'MASTER'.
Can you help me to learn more?
(Other definitions for master that I've seen before include "Schoolteacher" , "One in complete control; great artist" , "Skilled practitioner" , "Strong chess player" , "Main; overcome; original recording" .)