Guilty Holi players maybe discovered this way? (6,3-6)

I believe the answer is:

caught red-handed

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

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

'holi players maybe discovered this way?' is the wordplay.
I cannot quite see how this works, but
'discovered' could be 'caught' (catching is a kind of discovering) and 'caught' is found within the answer.
'way?' could be 'n' (Compass direction - North) and 'n' is located in the answer.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?

I've seen this clue in The Hindu.

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