Keep writing about new standard (6)
I believe the answer is:
pennon
'new standard' is the definition.
'pennon' can be an answer for 'standard' (I've seen this before). I'm not certain of the 'new' bit.
'keep writing about' is the wordplay.
'keep writing' becomes 'penn' (I can't justify this - if you can you should give a lot more credence to this answer).
'about' becomes 'on' (a book about x is on x).
'penn'+'on'='PENNON'
(Other definitions for pennon that I've seen before include "Triangular or swallow-tailed flag" , "Long flag, often tapering" , "Streamer on a lance" , "Ship's tapering flag" , "Narrow, swallow-tailed standard" .)