Surest way to get a reddish brown colour (6)
I believe the answer is:
russet
'colour' is the definition.
(I know that russet is a colour)
'surest way to get a reddish brown' is the wordplay.
'surest' becomes 's' (this might be a standard abbreviation of which I'm unaware).
'way' becomes 'e' (Compass direction - East).
'to get' indicates putting letters inside.
'a reddish brown' becomes 'rust' (I've seen this in another clue).
's'+'e'='se'
'se' inserted into 'rust' is 'RUSSET'.
Can you help me to learn more?
(Other definitions for russet that I've seen before include "Autumnal red as of leaves" , "Brown; apple variety" , "Reddish brown; apple" , "Autumnal reddish brown" , "Autumn red" .)