Weave together (6)
(Other definitions for entwine that I've seen before include "Braid" , "Weave - interlace" , "closely blend together" , "knit" , "Wind or twist together" .)
'weave together' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for splice that I've seen before include "Join rope ends by interweaving strands" , "Interweave strands" , "Join (rope or wedding couple)" , "Wed" , "Joint" .)