'We worked with Sid originally' (darts officials) (8)
I believe the answer is:
stewards
'officials' is the definition.
(I've seen this before)
'we worked with sid originally darts' is the wordplay.
'worked with' is an anagram indicator.
'originally' says to take the initial letters.
The initial letter of 'sid' is 's'.
's'+'darts'='sdarts'
'we' with its letters anagrammed with 'sdarts' gives 'STEWARDS'.
(Other definitions for stewards that I've seen before include "They look after passengers on aircraft or ship" , "Custodians" , "waiters" , "Attendants, on aircraft say" , "Persons employed to manage estates" .)