With a silver lining, so over-the-top it’s scandalous (7)
I believe the answer is:
outrage
'with a silver lining' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'over-the-top it's scandalous' is the wordplay.
'over' is an insertion indicator.
'the top' means to remove the first letter.
'it' becomes 'tag' (playground catching game).
'scandalous' becomes 'outre' (I can't justify this - if you can you should believe this answer much more).
'tag' with its initial letter removed is 'ag'.
'ag' placed into 'outre' is 'OUTRAGE'.
'so' acts as a link.
Can you help me to learn more?
(Other definitions for outrage that I've seen before include "furious reaction" , "Our gate (anag.)" , "Very angry reaction" , "Shock horror!" , "Shock grossly" .)