In public, itinerant’s lawful (5)
I believe the answer is:
licit
'lawful' is the definition.
(I know that lawful can be written as licit)
'in public itinerant's' is the wordplay.
'in' indicates the answer is hidden within the clue.
'LICIT' can be found hidden inside 'public itinerants'.
(Other definitions for licit that I've seen before include "OK?" , "Acceptable" , "not banned" , "Lawful, permitted" , "Not forbidden, lawful" .)