Flirt with the boy round the post office (5)
I believe the answer is:
spoon
'flirt' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
'boy round the post office' is the wordplay.
'boy' becomes 'son' (synonyms).
'round' indicates putting letters inside.
'the post office' becomes 'po'.
'son' placed around 'po' is 'SPOON'.
'with the' is the link.
Can you help me to learn more?
(Other definitions for spoon that I've seen before include "fellow eloper during high jump event" , "Piece of cutlery" , "One for taking soup" , "SECOND PART OF 15" , "Ancient club" .)