7a Paint roller - 'pain (bore) troller (inflammatory poster)'
15a Stephanie - 'step' (stage) + 'an(d)' (no 'd[aughter]', in) 'hie' (hurry)
18d Yes, We Have No Bananas (hand; bunch)
24a Reagent - 'rent' (covers) 'eg (for example) a' (back)
30a Screens-hot