Stomach failure from the diving board (5,4)
I believe the answer is:
belly flop
'the diving board' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
'stomach failure' is the wordplay.
'stomach' becomes 'belly' (synonyms).
'failure' becomes 'flop' (flop is a kind of failure).
'belly'+'flop'='BELLY-FLOP'
'from' acts as a link.
Can you help me to learn more?
(Other definitions for belly flop that I've seen before include "unattractive dive" , "Unfortunate dive" , "Painful dive" , "Ungainly sprawling dive" , "Awkward dive" .)