Go in unhappily, troubled in my disgrace (8)
I believe the answer is:
ignominy
'disgrace' is the definition.
('ignominy' can be a synonym of 'disgrace')
'go in unhappily troubled in my' is the wordplay.
'unhappily' indicates an anagram.
'troubled' indicates anagramming the letters.
'go'+'in'='goin'
'goin' anagrammed gives 'igno'.
'in'+'my'='inmy'
'inmy' with letters rearranged gives 'miny'.
'igno'+'miny'='IGNOMINY'
(Other definitions for ignominy that I've seen before include "State of disgrace or humiliation" , "Public dishonour" , "Public shame or disgrace" , "terrible disgrace?" , "Disgrace, odium" .)