Points out the informer (5)
I believe the answer is:
snout
'the informer' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'points out' is the wordplay.
'points' becomes 'sn'.
'sn'+'out'='SNOUT'
Can you help me to learn more?
(Other definitions for snout that I've seen before include "Nose, tobacco (colloq.)" , "Pig's nose" , "Nose; tobacco (slang)" , "nose of pig" , "Nose and mouth of a mammal" .)