Not the usual way to get in (2-8)

'in' is the definition.
Both the answer and definition are singular nouns.
Maybe there's a link between them I don't understand?

'not the usual way' is the wordplay.
I cannot really see how this works, but
'not' could be 'o' (I've seen this in other clues) and 'o' is found in the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is located in the answer.
'way' could be 'n' (Compass direction - North) and 'n' is present in the answer.
This may be the basis of the clue (or it may be nonsense).

'to get' is the link.

Can you help me to learn more?