D/S Jumbo puzzle

[lampost]

Last one,so thanks in advance for any help



Gigantic (7 Letters)


_ I _ M _ T _

[sarumite]

Mammoth ? is your I correct?

[lampost]

Thanks Sarumite
57 d The clue is
Showing changing colours like an opal
I made the answer olivescent
thats where i got the I from
Knowing me probably wrong I'll just check it

[lampost]

Just checked and you were right thanks for your help

[sarumite]

You're welcome lampost .. good luck!