Old Roman driver whose joy includes a disturbance (10)
I believe the answer is:
charioteer
'old roman driver' is the definition.
'charioteer' can be an answer for 'driver' (charioteer is a kind of driver). I am not certain of the 'old roman' bit.
'joy includes a disturbance' is the wordplay.
'joy' becomes 'cheer' (cheering is a kind of joying).
'includes' means one lot of letters goes inside another.
'disturbance' becomes 'riot' (I've seen this before).
'a'+'riot'='ariot'
'cheer' enclosing 'ariot' is 'CHARIOTEER'.
'whose' acts as a link.
Can you help me to learn more?
(Other definitions for charioteer that I've seen before include "Old carriage driver" , "Her erotica (anag)" , "Hippodrome racer" , "Porphyrius perhaps" , "Driver of Roman vehicle" .)