Indian state bordering Bhutan (5)
I believe the answer is:
assam
'indian state bordering bhutan' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for assam that I've seen before include "Indian state known for tea growing" , "India tea-producing state" , "Tea-growing state in north-east India" , "Indian state, famed for its tea" , "Indian tea-growing state" .)