Smart boy (4)
I believe the answer is:
alec
This clue might be a double definition.
'smart' is the first definition.
Both the answer and definition are singular nouns.
Maybe there's an association between them I don't understand?
'boy' is the second definition.
(boy's name)
Can you help me to learn more?
(Other definitions for alec that I've seen before include "Smart boy?" , "Actor Guinness is smart" , "Guinness (a smart lad?)" , "Sir - Douglas-Home, former PM" , "Smart chap" .)