Error that you print out at first (4)
I believe the answer is:
typo
'error' is the definition.
(I've seen this before)
'that you print out at first' is the wordplay.
'at first' suggests taking the first letters.
The first letters of 'that you print out' is 'TYPO'.
(Other definitions for typo that I've seen before include "Mistake in printed matter, in short" , "Printing error (colloq.)" , "literal, perhaps" , "Printer's error" , "Small printing error" .)