Put behind bars at Los Angeles, premier written up worldwide (13)
I believe the answer is:
international
'worldwide' is the definition.
(similar in meaning)
'put behind bars at los angeles premier written up' is the wordplay.
'put behind bars' becomes 'intern' (intern can mean to jail).
'los angeles' becomes 'la'.
'premier' becomes 'noi' (resembles No. 1 - the best or 'premier').
'written up' is a reversal indicator.
'la'+'noi'='lanoi'
'lanoi' reversed gives 'ional'.
'intern'+'at'+'ional'='INTERNATIONAL'
(Other definitions for international that I've seen before include "political group" , "Test (match)" , "Game played between countries" , "Existing between nations" , "Crossing country borders" .)