It can be sad how, unfortunately, these MPs oppose the government (6,7)
I believe the answer is:
shadow cabinet
'these mps oppose the government' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'it can be sad how unfortunately' is the wordplay.
'unfortunately' is an anagram indicator (a bad or unfortunate spelling).
'it'+'can'+'be'+'sad'+'how'='itcanbesadhow'
'itcanbesadhow' anagrammed gives 'SHADOW CABINET'.
Can you help me to learn more?
(Other definitions for shadow cabinet that I've seen before include "Opposition frontbenchers" , "Opposition front bench" , "Policy-making group of opposition party" , "part of the front bench" , "Opposition leaders" .)