Make a speech about medical chaos (7)
I believe the answer is:
declaim
'make a speech' is the definition.
(I've seen this before)
'medical chaos' is the wordplay.
'chaos' indicates an anagram.
'medical' is an anagram of 'DECLAIM'.
'about' is the link.
(Other definitions for declaim that I've seen before include "Speak dramatically" , "Orate" , "Recite with a touch of eloquence (7)" , "lecture" , "Hold forth" .)