Baste (4)
'baste' is the definition.
(I know that baste is a more specific form of the action sew)
This is all the clue.
(Other definitions for sew that I've seen before include "Use a needle and thread" , "Fasten with stitches" , "Stitch with needle and thread" , "Make stitches" , "Do some needlework" .)
'baste' is the definition.
(I know that baste can be written as tack)
This is the entire clue.
(Other definitions for tack that I've seen before include "pin" , "fix > riding gear" , "Alter course - riding gear" , "Drawing-pin" , "Type of nail" .)