Work into soup, possibly (4)
I believe the answer is:
opus
'work' is the definition.
(an opus is an artistic work)
'soup possibly' is the wordplay.
'possibly' indicates an anagram.
'soup' is an anagram of 'OPUS'.
'into' acts as a link.
(Other definitions for opus that I've seen before include "Musical composition in the soup" , "Composer's catalogue number" , "A Latin work" , "Work (of a composer?)" , "Work of 25 perhaps" .)