The colour Anne is turning (6)
I believe the answer is:
sienna
'the colour' is the definition.
(I've seen this before)
'anne is turning' is the wordplay.
'turning' says the letters should be written in reverse.
'anne'+'is'='anneis'
'anneis' backwards is 'SIENNA'.
(Other definitions for sienna that I've seen before include "Type of earth used as pigment" , "Earth colour, may be burnt" , "Earthy paint pigment" , "Brownish-yellow colour" , "Raw -; burnt -" .)