The hearts sink, going in to get the flowers! (8)
I believe the answer is:
corsages
'the flowers' is the definition.
Although both the answer and definition are plural nouns, I can't understand how they can define each other.
'the hearts sink going in' is the wordplay.
'the hearts' becomes 'cores' (core can mean the heart of something).
'sink' becomes 'sag' (sagging is a kind of sinking).
'going in' means one lot of letters goes inside another.
'cores' placed around 'sag' is 'CORSAGES'.
'to get' acts as a link.
Can you help me to learn more?
(Other definitions for corsages that I've seen before include "Posies, nosegays" , "sprays of flowers!" , "Go caress with small bouquets for woman" .)