Newcomer in India may be improvising, with tail all the way up (7)
I believe the answer is:
'india may be improvising with tail all the way up' is the definition.
I can't judge whether this defines the answer.
'newcomer in' is the wordplay.
'newcomer' becomes 'griff' (I can't explain this - if you can you should believe this answer much more).
Can you help me to learn more?
(Other definitions for griffin that I've seen before include "Eagle-headed monster" , "Mythical creature" , "Mythical beast" .)