Dog going round in the afternoon? (3)
I believe the answer is:
pom
'dog' is the definition.
(short for Pomeranian)
'going round in the afternoon?' is the wordplay.
'going round' becomes 'o' (o is a circular letter. I am not sure about the 'going' bit.).
'in the' indicates putting letters inside.
'afternoon?' becomes 'pm'.
'o' put inside 'pm' is 'POM'.
Can you help me to learn more?
(Other definitions for pom that I've seen before include "expat Englishman" , "Brit abroad" , "Shortened name for a breed of dog" , "Small dog (colloq.)" , "Australian slang for British migrant" .)