Bellyache from drinking rum punch (5)
I believe the answer is:
grump
'bellyache' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
'from drinking rum punch' is the wordplay.
'from' says the answer is hidden in the clue.
'GRUMP' can be found hidden inside 'drinking rum punch'.
Can you help me to learn more?
(Other definitions for grump that I've seen before include "grouse" , "pet?" , "Surly person" , "Sulky type" , "Sulky person" .)