Letters supporting case for a senior government role (7,4)
I believe the answer is:
cabinet post
'a senior government role' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.
'letters supporting case' is the wordplay.
'letters' becomes 'post' (letters in the mail or post).
'supporting' is a charade indicator (letters next to each other) (in a down clue, some letters go below others).
'case' becomes 'cabinet' (I've seen this before).
'post' put after 'cabinet' is 'CABINET POST'.
'for' is the link.
Can you help me to learn more?
(Another definition for cabinet post that I've seen is " government job".)