Pro in prime ruined: it's shocking (8)
I believe the answer is:
improper
'shocking' is the definition.
Both the answer and definition are adjectives. Perhaps they are linked in a way I don't understand?
'pro in prime ruined' is the wordplay.
'in' means one lot of letters goes inside another.
'ruined' indicates an anagram.
'prime' anagrammed gives 'imper'.
'pro' inserted within 'imper' is 'IMPROPER'.
'it's' is the link.
Can you help me to learn more?
(Other definitions for improper that I've seen before include "Not conforming to norms of conduct, maybe indecent" , "Not in line with accepted standards of morality" , "Not decorous or seemly" , "Not fitting" , "Indecent or unsuitable" .)