Rivers

[catspaws]

please help the answers are rivers

10 change one to be revolting (5)
ive heard answer given as volga but im wondering if it could be volta ?
36 TWO (underlined) river of (5)
45 strap before a composer (8)
thanks in advance for any thoughts :)

[fiction-factory]

Is Volti a river ?

[grasscarp]

10 Volga (change the o to u to make Vulga(r)) I am only guessing.
36 Torne - river of town called Wroot which is an anagram of TWO River Of
45 Whipling (composer Ling Peng?)

[mallyh]

when i answered 36 on 23rd feb it said two river of ,the two and r and o are underlined

[catspaws]

thank you fiction factory i dont know but volta is one
thanks grasscarp and mallyh