21 across
Insurable
activity
held
in
extra
velodrome
(6)
Insurable activity held in extra velodrome (6)
hints
0
checks
0
hints
The definition is at the beginning of the clue.
How the clue works
The definition is Insurable activity — travel insurance being very much a thing. The answer is hiding inside "extra velodrome" (exTRA VELodrome), with "held in" pointing you to that hidden word trick.