You

[charley-farley]

Help please
12 across ... very powerful person ..?L?G?T?H
18 down.. disrespectful laugh partly stifled,sly..???C?E?
5 down.. mammal - eg donkey..used to transport goods or equipment..( 4 & 6)
Thanks

[dannyk13]

Oligarch
Snicker
Pack animal

[Dollydimple99]

Oligarch
Snicker
Pack animal

[dannyk13]

3d.Linear gives the r in oligarch

[charley-farley]

Thank you all.

[Anneyelland]

I don't think snicker is what they meant - I think they meant SNIGGER but it doesn't fit the letters "! Snicker is the whinny of a horse !

[dannyk13]

Snicker | Define Snicker at Dictionary.com dictionary.reference.com/browse/snicker Snicker definition, to laugh in a half-suppressed, indecorous or disrespectful manner