Silent eccentric permits entry (4,2)

I believe the answer is:

lets in

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'permits entry' is the definition.
'lets in' can be an answer for 'permits' (letting in is a kind of permiting). I'm not sure about the 'entry' bit.

'silent eccentric' is the wordplay.
'eccentric' indicates anagramming the letters.
'silent' is an anagram of 'LETS IN'.

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