Make a scarf (4)
I believe the answer is:
knit
'make a scarf' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for knit that I've seen before include "Become joined" , "Tighten (eyebrows) in a frown; unite" , "Work with wool and needles" , "Make textiles with needles and wool" , "Wrinkle" .)