Boy gets around to returning soup (6)
I believe the answer is:
potage
'soup' is the definition.
(potage is a kind of soup)
'boy gets around to returning' is the wordplay.
'boy' becomes 'page' (I have seen 'Attendant boy ' mean 'page' so perhaps 'boy' could also mean 'page'**).
'gets around' is an insertion indicator.
'returning' says the letters should be written backwards.
'to' backwards is 'ot'.
'page' enclosing 'ot' is 'POTAGE'.
(Other definitions for potage that I've seen before include "Thick, often creamy soup" , "which is fairly thick" , "this spoon-fed?" , "> sort of liquid nourishment" , "that's thick" .)