Sew unlined articles together to form bandage (6)
I believe the answer is:
swathe
'bandage' is the definition.
(swathe is a kind of bandage)
'sew unlined articles together' is the wordplay.
I cannot quite understand how this works, but
'articles' could be 'athe' (two examples of the part-of-speech: a+the) and 'athe' is found within the answer.
This explanation may well be incorrect...
'to form' acts as a link.
Can you help me to learn more?
(Other definitions for swathe that I've seen before include "Swaddle - cut strip" , "Wrap; bandage" , "considerable cut" , "Strip cut by a scythe" , "Broad strip or area; wrap in fabric" .)