Sends word about reprimand (5,4)
I believe the answer is:
dress down
'reprimand' is the definition.
(I know that reprimand can be written as dress down)
'sends word about' is the wordplay.
'about' is an anagram indicator.
'sends'+'word'='sendsword'
'sendsword' anagrammed gives 'DRESS DOWN'.
(Other definitions for dress down that I've seen before include "Wear informal attire" , "knickers being exposed?" , "Maybe keep tie off" , "Severely reprimand; be informal" , "Be unsuited" .)