The map I take round in the vehicle (7)
I believe the answer is:
chariot
'the vehicle' is the definition.
(chariot is a kind of vehicle)
'the map i take round in' is the wordplay.
'the map' becomes 'chart' (chart is a kind of map).
'i take round' becomes 'io' (I am not sure about this - if you are sure you should believe this answer much more).
'in' indicates putting letters inside.
'chart' enclosing 'io' is 'CHARIOT'.
Can you help me to learn more?
(Other definitions for chariot that I've seen before include "Stately vehicle" , "Ancient horse-drawn war vehicle" , "Roman two-wheeled vehicle" , "former military vehicle" , "'Two-wheeled, horse-drawn vehicle (7)'" .)