Under contract finally, see pretty amazing old print worker (10)
I believe the answer is:
typesetter
'old print worker' is the definition.
(worker in traditional printing methods)
'under contract finally see pretty amazing' is the wordplay.
'under' is a charade indicator (letters next to each other).
'finally' says to take the final letters.
'amazing' indicates an anagram.
The final letter of 'contract' is 't'.
'see'+'pretty'='seepretty'
'seepretty' is an anagram of 'ypesetter'.
't' next to 'ypesetter' is 'TYPESETTER'.
(Other definitions for typesetter that I've seen before include "print worker" , "Press worker" , "Printing expert" , "one putting printed words in right order?" , "whose work will leave a lasting impression?" .)