Relative's place accommodating papa and daughter (7)

I believe the answer is:

stepdad

'relative's' is the definition.

'place accommodating papa and daughter' is the wordplay.
'place' becomes 'stead' (synonyms).
'accommodating' indicates putting letters inside.
'papa' becomes 'P' (phonetic alphabet: alpha, bravo, charlie etc.).
'and' is a charade indicator (letters next to each other).
'daughter' becomes 'd' (genealogical abbreviation).
'p'+'d'='pd'
'stead' enclosing 'pd' is 'STEPDAD'.

I've seen this clue in The Times.

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