I'm held in scorn, turning red (7)
I believe the answer is:
crimson
'red' is the definition.
(I know that red can be written as crimson)
'i'm held in scorn turning' is the wordplay.
'held in' means one lot of letters goes inside another.
'turning' indicates an anagram.
'scorn' with letters rearranged gives 'crson'.
'im' going inside 'crson' is 'CRIMSON'.
(Other definitions for crimson that I've seen before include "Bright red" , "Shade of red" , "Ruddy" , "Deep red colour" , "Become red-faced" .)