Orbit -- hip new bar (8)
I believe the answer is:
prohibit
'bar' is the definition.
(thesaurus)
'orbit hip new' is the wordplay.
'new' indicates anagramming the letters.
'orbit'+'hip'='orbithip'
'orbithip' anagrammed gives 'PROHIBIT'.
(Other definitions for prohibit that I've seen before include "Disallow" , "Formally forbid" , "Forbid, ban" , "Proscribe, forbid" , "Ban; prevent" .)