Get to grips with meandering stream (6)
I believe the answer is:
master
'get' is the definition.
(thesaurus)
'meandering stream' is the wordplay.
'meandering' is an anagram indicator.
'stream' is an anagram of 'MASTER'.
'to grips with' is the link.
This may not be correct. Some or all of it may be part of another bit of the clue.
(Other definitions for master that I've seen before include "Teacher to gain control" , "Male teacher or ship's captain" , "With 1a [OLD], one who painted" , "with 1a [NEW] Jacky may have in nursery" , "Craftsperson of great skill" .)