Strange couplet having eight parts (7)
I believe the answer is:
octuple
'having eight parts' is the definition.
I can't tell whether this defines the answer.
'strange couplet' is the wordplay.
'strange' is an anagram indicator.
'couplet' with letters rearranged gives 'OCTUPLE'.
Can you help me to learn more?
(Other definitions for octuple that I've seen before include "8 times" , "multiply by eight" , "Couplet (anag)" , "Eightfold" , "more than seven times" .)