1. Cape Lindock Lighthouse omitted to turn on the light (7)
2. Brenton was the nearest to the fight (7, 10) could be (7, 4, 6) depending on what book you reference
3. Each of the two notes at the extremes of an octave (6)
4. A low type of Hippopotamus (5, 3)
5. Larry's sugar pie was discovered working in Taree (10)
I have #3 as AVOCET . . and #5 as SHEARWATER but not confident