Crossword Genius

Such times are difficult to describe (4)

Ross

I believe the answer is:

hard

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

Here is my best explanation:

'such' is the definition.
Both the answer and definition are adjectives. Maybe there's an association between them I don't understand?

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

This clue was last seen in Evening Standard