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 justify this - if you can you should believe this answer much more).
'i'+'so'+'lated'='ISOLATED'
'to leave england' is the link.
This may not be right. Some or all of it may be part of 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" .)