Motherese discombobulated triplets (9)
I believe the answer is:
threesome
'triplets' is the definition.
(I've seen this before)
'motherese discombobulated' is the wordplay.
'motherese' anagrams to 'THREESOME'.
But, I'm unsure how this is indicated.
Can you help me to learn more?
(Other definitions for threesome that I've seen before include "triplets, perhaps?" , "Horse meet (anag.)" , "triangular event" , "Trio" , "Freeman Hardy Willis, say" .)