2 down
One
runs
attached
to
bloke
for
three-legged
race
(7)
One runs attached to bloke for three-legged race (7)
hints
0
checks
0
hints
The definition is at the end of the clue.
How the clue works
See three-legged race at the end — that's your definition, a cheeky nod to the Ironman triathlon having three legs, swim, cycle and run. For the wordplay, take I for "one", R for "runs", ON for "attached to", and MAN for "bloke", and string them together to get there.