India's very happy to leave England cut off (8)
I believe the answer is:
isolated
'cut off' is the definition.
(I've seen this before)
'india's very happy' is the wordplay.
'india' becomes 'i' (phonetic alphabet: alpha, bravo, charlie etc.).
'very' becomes 'so' (both can mean 'extremely').
'happy' becomes 'lated' (I can't explain this - if you can you should give a lot more credence to this answer).
'i'+'so'+'lated'='ISOLATED'
'to leave england' acts as a link.
This may not be right. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for isolated that I've seen before include "'Detached, kept apart (8)'" , "kept apart from others" , "Set apart, quarantined" , "Placed apart from others" , "hard to find" .)