Errors in printing? Tear a royal arrangement (6)
I believe the answer is:
errata
'errors in printing?' is the definition.
(I've seen this before)
'tear a royal arrangement' is the wordplay.
'royal' becomes 'r' (abbreviation).
'arrangement' indicates anagramming the letters.
'tear'+'a'+'r'='tearar'
'tearar' with letters rearranged gives 'ERRATA'.
(Other definitions for errata that I've seen before include "List of text corrections to be made in a publication" , "Feeling nausea" , "mistakes in print" , "Listed errors" , "List of misprints" .)