Parental dude initially in another’s place? (7)

'place?' is the definition.
Both the definition and answer are singular nouns.
Perhaps there's an association between them I don't understand?

'parental dude initially in another's' is the wordplay.
'initially' suggests taking the first letters.
'in' is an insertion indicator.
'another's' becomes 'stead' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
The first letters of 'parental dude' is 'pd'.
'pd' going into 'stead' is 'STEPDAD'.

Can you help me to learn more?