Alarming exclamation from TV doctor before surgical procedures! (6)
I believe the answer is:
whoops
'alarming exclamation' is the definition.
(exclamation that may be said in alarm)
'tv doctor before surgical procedures' is the wordplay.
'tv doctor' becomes 'who' (I've seen this in other clues).
'before' means one lot of letters go next to another.
'surgical procedures' becomes 'ops' (op is short for operation).
'who'+'ops'='WHOOPS'
'from' acts as a link.
(Other definitions for whoops that I've seen before include "Yikes, I've dropped something!" , "Exclamation after making a mistake" , "Exclamation after a mistake; wild cries" , "Oh dear! That was a mistake!" , "Worrying cry" .)