In a cryptic hidden word clue, the word you are looking for is actually hidden inside the clue itself!

For example:

A month in London is a nightmare (5)

In this case the thing you are looking for is a month.

The word Nisan is hidden inside of LondoN IS A Nightmare.

There is normally a hidden word indicator that tells you that this is a hidden word type clue. In this case it is the word in.

Other hidden word indicators are words like Some or Part.

Now try this clue:

If you are stumped, give it to the machine!