Crossword Genius

The dark knight has been guillotined (5)

Ross

I believe the answer is:

night

I'm a little stuck... Click here to teach me about this clue!

Here is my best explanation:

'the dark' is the definition.
(night is a kind of dark)

'knight has been guillotined' is the wordplay.
'NIGHT' is hidden in amongst the letters.
But, I'm not sure how this is indicated.

Can you help me to learn more?

This clue was last seen in The Globe and Mail