Fibre ultimately absent, lady keen to knit without threads (7)
I believe the answer is:
nakedly
'fibre ultimately absent lady keen' is the definition.
I can't judge whether this definition defines the answer.
'knit without threads' is the wordplay.
I cannot quite see how this works, but
'without threads' could be 'naked' (I've seen this in another clue) and 'naked' is present in the answer.
This explanation may well be incorrect...
'to' acts as a link.
Can you help me to learn more?
(Other definitions for nakedly that I've seen before include "Barely, nudely" , "(Done) without shame, or clothes!" , "in blatant fashion" , "In nude manner" , "In an unclothed manner" .)