Threesome breaking novice's heart (4)
I believe the answer is:
trio
This could be a double definition.
'threesome' is the first definition.
(both can mean a group of three)
'breaking novice's heart' is the second definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
Can you help me to learn more?
(Other definitions for trio that I've seen before include "Riot (anag)" , "Ensemble musical piece, eg Beethoven's 'Archduke'" , "wise men?" , "Beethoven's 'Archduke', for example" , "Beethoven's 'Archduke': famous piece written for this ensemble" .)