Another very enjoyable Sunday puzzle.
Information about senior staff in plant (9) = GOLDENROD
information = GEN, senior = OLD, staff = ROD
Seek opinion from son on work of art (7) = CANVASS
son = S, work of art = CANVAS
Fruit turned up by politician with family (7) = PUMPKIN
turned = reverse, turned up = PU, politician = MP, family = KIN