Worker in print company ordered import covering operating system (10)
I believe the answer is:
compositor
'worker in print' is the definition.
(someone who arranges type for printing)
'company ordered import covering operating system' is the wordplay.
'company' becomes 'co' (abbreviation).
'ordered' indicates an anagram.
'covering' is an insertion indicator.
'operating system' becomes 'os' (synonyms).
'import' anagrammed gives 'mpitor'.
'mpitor' going around 'os' is 'mpositor'.
'co'+'mpositor'='COMPOSITOR'
(Other definitions for compositor that I've seen before include "Print worker" , "one in the printing industry" , "typesetter" , "I set in print room" , "One assembling material" .)