Error starting the yearbook’s print output (4)
I believe the answer is:
typo
'error' is the definition.
(I've seen this before)
'starting the yearbook's print output' is the wordplay.
'starting' says to take the initial letters.
The first letters of 'the yearbooks print output' is 'TYPO'.
(Other definitions for typo that I've seen before include "Literal - printing mistake" , "Thanks; good health!" , "Misprint" , "Finger problem" , "literal, perhaps" .)