Double entendre's original twist (5)
I believe the answer is:
twine
'twist' is the definition.
(twining is a kind of twisting)
'double entendre's original' is the wordplay.
'double' becomes 'twin' (I've seen this before).
'original' indicates taking the first letters.
The first letter of 'entendres' is 'e'.
'twin'+'e'='TWINE'
(Other definitions for twine that I've seen before include "weaving" , "wind" , "Curl; string" , "Tough string" , "Coil" .)