Roam around with one native (5)
I believe the answer is:
maori
'native' is the definition.
(I've seen this before)
'roam around with one' is the wordplay.
'around' indicates anagramming the letters.
'with' is a charade indicator (letters next to each other).
'one' becomes 'i' (Roman numeral).
'roam' anagrammed gives 'maor'.
'maor'+'i'='MAORI'
(Other definitions for maori that I've seen before include "Native New Zealanders" , "Indigenous New Zealanders" , "aboriginal inhabitant" , "A native from the south" , "Native of Aotearoa" .)