Battlefield doctor (5)
I believe the answer is:
medic
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">battlefield doctor</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for medic that I've seen before include "Physician (informal)" , "What was Basutoland" , "Eg, doctor" , "Health worker" , "He may offer treatment" .)