Some knitting quietly used rude language originally (4)
I believe the answer is:
purl
'some knitting' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'quietly used rude language originally' is the wordplay.
'quietly' becomes 'p' (p for piano and quiet).
'originally' indicates taking the first letters.
The first letters of 'used rude language' is 'url'.
'p'+'url'='PURL'
Can you help me to learn more?
(Other definitions for purl that I've seen before include "Knitting stitch type" , "Twisted gold wire" , "form loop" .)