Say adios to him (5)
I believe the answer is:
amigo
'say adios to him' is the definition.
The definition suggests a singular noun which matches the answer.
This is the entire clue.
Can you help me to learn more?
(Other definitions for amigo that I've seen before include "Quixote's friend" , "China (in Spain's view)" , "buddy abroad?" , "Friend from Spain?" , "Hispanic friend" .)