An element in Bihar go native (5)
I believe the answer is:
argon
'an element' is the definition.
(argon is a kind of element)
'in bihar go native' is the wordplay.
'in' indicates a hidden word.
'ARGON' can be found hidden inside 'bihar go native'.
(Other definitions for argon that I've seen before include "Gas, inert constituent of air" , "An insert gas to groan about" , "rare gas" , "Gas, 1% of atmosphere" , "Noble gas used in light bulbs" .)