Travel about, carrying papers (4)
I believe the answer is:
ride
'travel' is the definition.
(riding is a kind of travelling)
'about carrying papers' is the wordplay.
'about' becomes 're' (regarding**).
'carrying' is an insertion indicator.
'papers' becomes 'id' (identification papers).
're' enclosing 'id' is 'RIDE'.
(Other definitions for ride that I've seen before include "Journey on horse?" , "Sit on (a horse/vehicle)" , "Travel in or be carried on" , "Take a trip" , "badger" .)