Rings about turning up for work (4)
I believe the answer is:
opus
'work' is the definition.
(thesaurus)
'rings about turning up' is the wordplay.
'rings' becomes 'os'.
'about' is an insertion indicator.
'turning' is an anagram indicator.
'up' is an anagram of 'pu'.
'os' going around 'pu' is 'OPUS'.
'for' acts as a link.
(Other definitions for opus that I've seen before include "Musical composition in the soup" , "Showing creative skill" , "Work (mus.)" , "Work (of a composer?)" , "Soup (anag.)" .)