Sewing implements not quite unnecessary (7)
I believe the answer is:
needles
'sewing implements' is the definition.
(I've seen this before)
'not quite unnecessary' is the wordplay.
'not quite' means to remove the last letter (most but not all of the word).
'unnecessary' becomes 'needless' (similar in meaning).
'needless' with its last letter taken off is 'NEEDLES'.
(Other definitions for needles that I've seen before include "Winds up" , "nettles" , "Sewing aids" , "Is annoying" , "They may play LPs" .)