Possible Clues:

• It justifies a game I introduced to Georgia
• Justification for a flower cut from the trunk of a tree with a fair amount of chia
• A game soldier first to attempt a written defence
• A sport -- I'll occupy half of game in defence
• Defensive writing in articles about game American fighter
• Article on a game fighter provides formal defence
• A game one has first to accept, with good justification
• Motoring organisation admits car is for solider in Defence
• Formal written defense
• First-class try cut short a rising defence