Rats maybe found inside? Never mind! (6)

I believe the answer is:

vermin

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'rats maybe' is the definition.
'vermin' can be an answer for 'rats' (I've seen this before). I am not sure about the 'maybe' bit.

'found inside? never mind' is the wordplay.
'found' indicates the answer is hidden within the clue.
'VERMIN' can be found hidden inside 'inside never mind'.

Can you help me to learn more?

(Other definitions for vermin that I've seen before include "Eg foxes, rodents, vile persons etc." , "Annoying small animals or insects" , "Small pests" , "Destructive animals" , "Odious creatures" .)

I've seen this clue in The Guardian.

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