Elitist changing negative answer to positive after raising children (4)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

Reversal of ( … after raising , in a down clue) “snob”(an elitist/one demonstrating a superior attitude towards those considered to be of a lower social class) with “n”(abbrev. for “no”/negative answer) replacing ( changing … to ) “y”(abbrev. for “yes”/positive answer).