Interweave (5)
'interweave' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for splice that I've seen before include "Join ropes together by interweaving" , "Join (ropes) by interweaving strands" , "Join rope ends together by weaving" , "Interweave strands" , "Join (rope or wedding couple)" .)
'interweave' is the definition.
(I know that plait is a more specific form of interweave)
This is the entire clue.
(Other definitions for plait that I've seen before include "Braided hairdo" , "Woven length of hair" , "Stranded length of hair" , "Interwoven length of hair" , "Hair braid" .)