Good boy with kids in Sunday dress? (4,4)
I believe the answer is:
glad rags
'sunday dress?' is the definition.
The definition suggests a singular noun which matches the answer.
'good boy with kids' is the wordplay.
'good' becomes 'g' (abbreviation).
'boy' becomes 'lad' (lad is a kind of boy).
'with' is a charade indicator (letters next to each other).
'kids' becomes 'rags' (I've seen this before).
'g'+'lad'+'rags'='GLAD RAGS'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for glad rags that I've seen before include "Fancy clothes for laggards" , "best suit" , "What partygoers showed up in" , "Special kit" , "Dressy clothes - happy threads" .)