He rides the high horse because of his high connection.

The involvement of teachers in the scheme of education proves to be a <u><em>mare's nest</em></u&gt…

He resigned the post of <u><em>his own accord</em></u>.

To play second fiddle

To go to each other hammer and tongs

To read between the lines

They sold their house because it was a real <u><em>white elephant</em></u>.

To change colour

He resigned the post <u><em>of his own accord</em></u>.