Getting angry about nothing is a funny thing (4)
I believe the answer is:
hoot
'a funny thing' is the definition.
The answer and definition can be both human attributes as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'getting angry about nothing' is the wordplay.
I cannot quite see how this works, but
'nothing' could be 'o' (O resembles 0) and 'o' is found in the answer.
'angry' could be 'hot' (I've seen this in another clue) and 'hot' is located in the remaining letters.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'is' acts as a link.
Can you help me to learn more?
(Other definitions for hoot that I've seen before include "Owlish cry" , "Owl's cry" , "Cry of owl" , "Screech" , "scream" .)