Writing material put back in cupboard and bound together (5-4)
I believe the answer is:
close-knit
'bound together' is the definition.
(I've seen this before)
'writing material put back in cupboard' is the wordplay.
'writing material' becomes 'ink' (substance for writing with).
'put back' says the letters should be written backwards.
'in' means one lot of letters goes inside another.
'cupboard' becomes 'closet' (type of cupboard).
'ink' reversed gives 'kni'.
'kni' going inside 'closet' is 'CLOSE-KNIT'.
'and' acts as a link.
(Other definitions for close-knit that I've seen before include "Tightly bound together" , "Intimate as a group" , "Thick" , "United or joined together - with wool?" , "No tickles, being woven tightly" .)