Not known for accepting military decoration, etc (3,2,2)
I believe the answer is:
and so on
'etc' is the definition.
(I've seen this before)
'not known for accepting military decoration' is the wordplay.
'not known' becomes 'anon' (anonymous).
'for accepting' indicates putting letters inside.
'military decoration' becomes 'dso' (distinguished service order).
'anon' going around 'dso' is 'AND SO ON'.
(Other definitions for and so on that I've seen before include "Et cetera" , "Continuing in the same way" , "I say no more" , "Etc. (3.2.2)" , "Etc - in English and in full" .)