A Luke Borrelli effort with 18 minutes left of play secured Afan Lido's sixth Corbett Sports WPL victory of the season.
Simon Prangley had given the home side an 8th minute lead before Zac Evans equalized for Newtown just before the half hour mark.
Lido - who had four members of their youth team on the field of play by the final whistle - still have a mountain to climb to avoid the drop - but maximum points from this match will certainly help their cause.
Sicrhaodd goliau Simon Prangley a Luke Borrelli fuddugoliaeth werthfawr i Lido Afan Ddydd Llun y Pasg.
Zac Evans hawliodd unig gol Y Drenewydd wedi bron i hanner awr o chwarae.