One caught after lesson producing standard work (7)
I believe the answer is:
classic
'standard work' is the definition.
'one caught after lesson' is the wordplay.
'one' becomes 'i' (Roman numeral).
'caught' becomes 'c' (cricket abbreviation).
'after' means one lot of letters go next to another.
'lesson' becomes 'class' (I've seen this before).
'i'+'c'='ic'
'ic' put after 'class' is 'CLASSIC'.
'producing' is the link.
(Other definitions for classic that I've seen before include "The Derby or The Oaks, for example" , "Good example of its kind" , "Creation of the highest standard" , "Accepted as excellent" , "Great piece of creative writing" .)