Part of work of worker in company (5)
I believe the answer is:
canto
'part of work' is the definition.
'canto' can be an answer for 'part' (canto is a kind of part). I'm unsure of the 'of work' bit.
'worker in company' is the wordplay.
'worker' becomes 'ant' (worker is a type of ant).
'in' indicates putting letters inside.
'company' becomes 'co' (abbreviation).
'ant' put inside 'co' is 'CANTO'.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for canto that I've seen before include "Poetic piece" , "part of long poem" , "lines" , "Section of a long poem" , "Highest part in a piece of choral music -- act on (anag)" .)