Ornamental fabric, narrow part first, for string of beads (8)
I believe the answer is:
necklace
'string of beads' is the definition.
(I've seen this before)
'ornamental fabric narrow part first' is the wordplay.
'ornamental fabric' becomes 'lace' (I've seen this before).
'narrow part' becomes 'neck' (I've seen this before).
'first' means one lot of letters go next to another.
'lace' after 'neck' is 'NECKLACE'.
'for' acts as a link.
(Other definitions for necklace that I've seen before include "Item of jewellery" , "Ornamental feature" , "Jewellery chain" , "Eg, a choker" , "responsible for murder in South Africa" .)