Tense and nervous (2,4)
(Other definitions for on edge that I've seen before include "Highly strung" , "Tense and irritable, with nerves stretched" , "Fidgety, nervous" , "looking down at Much Wenlock?" , "Nervous and tense - close to cliff?" .)
(Other definitions for on edge that I've seen before include "Highly strung" , "Tense and irritable, with nerves stretched" , "Fidgety, nervous" , "looking down at Much Wenlock?" , "Nervous and tense - close to cliff?" .)