Meant to change the silver lining to a reddish purple (7)
I believe the answer is:
'a reddish purple' is the definition.
(I've seen this before)
'meant to change the silver lining' is the wordplay.
'to change' is an anagram indicator.
'the silver' becomes 'ag' ('Ag' can be a synonym of 'silver').
'lining' indicates putting letters inside.
'meant' is an anagram of 'menta'.
'menta' enclosing 'ag' is 'MAGENTA'.
'to' is the link.
(Other definitions for magenta that I've seen before include "Bright purplish-red" , "Purplish-pink colour" , "A crimson dye" , "Light purplish-red" , "fuchsia" .)