Possible Clues:

• Centre half, perhaps, given ball back gets closer
• Fed up with the finisher that's not for the prosecution
• Fed up with the finisher not being in the attack
• Although not offensive, one gets fed up with the one that finishes, it seems
• Back in form to play a game of football?
• He is there to protect back, for example
• One who takes up the cause of another
• One who protects from danger or takes one's side
• Delay holding conclusion back
• Lawyer, at times