Loose end in knotted cord for ornamentation (5)
I believe the answer is:
decor
'ornamentation' is the definition.
(I've seen this before)
'loose end in knotted cord' is the wordplay.
'end' says to take the final letters.
'in' is an insertion indicator.
'knotted' indicates anagramming the letters.
The last letter of 'loose' is 'e'.
'cord' anagrammed gives 'dcor'.
'e' placed within 'dcor' is 'DECOR'.
'for' acts as a link.
(Other definitions for decor that I've seen before include "Room colour scheme, furnishings, etc" , "Furnishings and colours of a room" , "Colour scheme, furnishing etc. of a room" , "Choice of colour" , "(Room) design" .)