Each word always begins with the letters SP. The two part question has two different sets of clues. Now, what is that word you're looking for?
-1.SP + A fighter pilot who has destroyed several enemy aircraft = The universe. 5 letters
-2.SP + A shelter or refuge = A short pulse or flow of electric current. 5
-3.SP + The vertebrate organ of hearing = A long pointed rod used as a weapon. 5
-4.SP + To bring to a conclusion = To wear out; exhaust. 5
-5.SP + A substance derived from petroleum = To damage or ruin. 5
6.SP + A piece of cloth used for cleaning = A young salmon or pit prop. 5
-7.SP + A narrow beam of light = A fine jet of liquid discharged from a pressurized container. 5
-8.SP + To bind or secure with rope, string, or cord = To cause a fluid to scatter. 6
-9.SP + Clinging bits of fiber and fluff = Device used to immobilize a broken leg. 6
-10.SP + To learn or get knowledge of from something written or printed = To open to a fuller extent or width. 6