No compromise in Parliament (abandoned by Opposition leader) (3,2,7)
I believe the answer is:
all or nothing
'no' is the definition.
Both the answer and definition are adjectives.
Maybe they are linked in a way I don't understand?
'compromise in parliament abandoned by opposition leader' is the wordplay.
I cannot quite see how this works, but
'in' is within the answer.
'abandoned' could be 'lorn' (I've seen this in another clue) and 'lorn' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for all or nothing that I've seen before include "Desperate choice" , "With uncompromising attitude" , "wanting no part of it?" , "To be attempted regardless of failure" .)