Sunday Telegraph Cryptic 2951

[Four Clubs]

Yet again I am struggling and asking for help, please.
10ac Put writer's material back in cupboard, tightly bound together (5-4ltrs) c?o?? ?n?? I really should be able to solve this clue!!
5dn People really smart and elegant in list I revised (14ltrs) i?????i?????i?
Not much help I'm afraid. Is it an anagram of "in list I revised?"
18ac Stupid consable forgetting name - that impedes progress (8ltrs) ?b???c??
29ac The student, primarily,is presenting research work (6ltrs)?h?s??
3dn I approach home in tree seriously (2,7ltrs) i? ????e??
Many thanks. Four Clubs

[Lie-in King]

10a Close-knit - 'ink' (back, in) 'closet'
5d Intelligentsia - anag 'elegant in list I'
18a Obstacle - anag 'co(n)stable' (forgetting 'n[ame]')
29a The-s(tudent)-is
3d I-n ear nest

[trixie007]

5d. Intelligentsia.

[Four Clubs]

Many thanks indeed Lie-in-King and trixie007. Four Clubs