Stream meandering round a bend for ages (7)
I believe the answer is:
matures
'ages' is the definition.
('mature' can be a synonym of 'age')
'stream meandering round a bend' is the wordplay.
'meandering' is an anagram indicator.
'round' is an insertion indicator.
'a bend' becomes 'U' (a U-bend is a kind of bend - pipe under sink).
'stream' anagrammed gives 'matres'.
'matres' enclosing 'u' is 'MATURES'.
'for' is the link.
(Other definitions for matures that I've seen before include "develops" , "Ripens" .)