Weave, interlace (7)
I believe the answer is:
entwine
I believe this is a double definition.
'weave' is the first definition.
(I've seen this before)
'interlace' is the second definition.
(synonyms)
(Other definitions for entwine that I've seen before include "Interweave" , "knit" , "Braid" , "Weave - interlace" , "closely blend together" .)