Clue: Cocky, losing head, leaders of Tranmere Rovers find cash for 75,000-capacity ground (3,8)
Answer: OLD TRAFFORD
Explanation: Definition: 75,000-capacity ground
A charade of [b]OLD ('cocky') minus the first letter ('losing head'), plus TR ('leaders of **T**ranmere **R**overs') plus AFFORD ('find cash'), for Manchester United's ground of around 75,000 capacity.