Closed end, done, undone (8)
I believe the answer is:
buttoned
'closed' is the definition.
('buttoned' can be similar in meaning to 'closed')
'end done undone' is the wordplay.
'end' becomes 'butt' (I've seen this before**).
'undone' is an anagram indicator.
'done' is an anagram of 'oned'.
'butt'+'oned'='BUTTONED'
(Other definitions for buttoned that I've seen before include "Fastened by small pieces of metal or plastic" , "Of coat, closed using small discs" , "Secured" .)