Nasty creatures found in silver mines (6)

I believe the answer is:

vermin

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'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'm not sure about the 'nasty' bit.

'in silver mines' is the wordplay.
'in' indicates a hidden word.
'VERMIN' can be found hidden inside '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.

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