The implementation of tax policy has always been a tricky business.

I knew it was going to be a tricky business.

They can do it all right, but it's a tricky business.

Using chemicals can be a tricky business, especially when it comes to working out how much to use.

It's a tricky business, this question of the doctor's image.

It is a tricky business I expect never to master.

You are vulnerable, especially now, and it is a tricky business.

Then there'd be the tricky business of getting people to vote for whatever I came up with!

This new project in Room 21 was a tricky business.

Going underground is a tricky business at the best of times.