Some doctors send a message about violent emotion (7)
I believe the answer is:
madness
'violent emotion' is the definition.
'madness' can be an answer for 'emotion' (madness is a kind of emotion). I am not certain of the 'violent' bit.
'some doctors send a message about' is the wordplay.
'some doctors' indicates an anagram.
'message' becomes 'ms' (MS is an example**).
'about' indicates putting letters inside.
'send'+'a'='senda'
'senda' is an anagram of 'adnes'.
'adnes' going within 'ms' is 'MADNESS'.
Can you help me to learn more?
(Other definitions for madness that I've seen before include "Group" , "Folly" , "Lunacy - ska/pop band" , "Irrationality" , "hysteria?" .)