Literary fragments smart guy introduced to workers (8)
I believe the answer is:
analects
'literary fragments' is the definition.
(I've seen this before)
'smart guy introduced to workers' is the wordplay.
'smart guy' becomes 'alec' (as in the phrase 'smart Alec').
'introduced to' is an insertion indicator.
'workers' becomes 'ants' (worker ants).
'alec' put inside 'ants' is 'ANALECTS'.
(Other definitions for analects that I've seen before include "literary fragments" , "Confucius' work" .)