I have a shipping record of a Jane CLELLAND aged 20 arriving Port Phillip June 1856, which would mean that they were married before emigrating but no other Clellands on that ship. Dates are a bit fuzzy too but possible.
Maybe this is not your Jane.
Your Jane Bankier and David Clelland had the following children registered in Victoria.
Alexander born
1855 Creswick (Registered as Cleland)[married Lotta Evylean Reid 1882]
Mary born 1857 Heathcote. Died 1914 Heathcote age 57 [married George Douglas Ferguson 1881]
Samuel born 1859 Heathcote
David born 1862 Heathcote
Margaret born 1864 Heathcote.Died 1919 Yarra Glen age 54 [married Edward Charles Morris 1886]
William Nicholas born 1867 Heathcote
Janet Bankier born 1872 Heathcote
Possible deaths for
Janet - Jessie Bankie Clelland died 1941 age 68 years East Melbourne
Father: David Mother:Jean Bankie
Alexander - Alexander Clelland died 1915 age 60 years Costerfield
Father: David Mother: Janie Unknown
Hope this helps
Raylen