6d Spirit good, securing complete channel system (9) G?T?E?I?G Is this GUTTERING (channel)?
21a Reminiscent of housing cost, social security collected(8) ???O?E?T
18d Moon in Borneo, hazy (6) O???O? Is this OBERON? (anag of BORNEO)
26a Grind, emptying out green powder (5) ?N?S?
20d Attend to a bandage for the ear? (7) A?D?E??
Please could I have reasoning for the answers.