Understand printer corrected text regularly (9)
I believe the answer is:
interpret
'understand' is the definition.
(I know that understand can be written as interpret)
'printer corrected text regularly' is the wordplay.
'corrected' indicates an anagram.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
The alternate letters of 'text' are 'et'.
'printer' is an anagram of 'interpr'.
'interpr'+'et'='INTERPRET'
(Other definitions for interpret that I've seen before include "Translate, make sense of" , "Read" , "Restate from one language into another" , "Discern the meaning of" , "Assign one's own meaning to" .)