Nasty creatures found in silver mines (6)

I believe the answer is:

vermin

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

'nasty creatures' is the definition.
'vermin' can be an answer for 'creatures' (I have seen 'Odious creatures' mean 'vermin' so perhaps 'creatures' could also mean 'vermin'). I am unsure of the 'nasty' bit.

'in silver mines' is the wordplay.
'in' indicates the answer is hidden within the clue.
'VERMIN' is hidden within 'silver mines'.

'found' is the link.

Can you help me to learn more?

(Other definitions for vermin that I've seen before include "Harmful or disease-ridden animals" , "Unwanted creature(s)" , "Small pests" , "cockroaches, for example" , "eg Rats" .)

I've seen this clue in The Irish News.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.