Possible Clues:

• One hoping to be satisfied with a second helping
• Eg Laertes, in final act, less sensitive about point
• One who seeks satisfaction with a second helping
• One's living sounds so precious one will fight for it
• One has to fight to keep what's precious, by the sound of it
• One settling a point of honour
• Person seeking satisfaction with a second helping
• One will fight with the sound of 7 down
• Sounds as if he will fight and sell rings round (7)
• Sounds as if you'd get precious little from one by fighting