7 across
Hoot
passing
steamer
in
9
(7)
Hoot passing steamer in 9 (7)
hints
0
checks
0
hints
The definition is at the end of the clue.
How the clue works
Here in 9 refers to the answer to 9 across, RACE, so the definition points to a chariot race — the vehicle that races. The wordplay builds CHA (tea, a steaming cuppa = 'steamer') followed by RIOT ('hoot', meaning something hugely funny), giving CHA + RIOT.