Pain from pang in arm? (6)
I believe the answer is:
angina
'pain' is the definition.
(I know that angina is a type of chest pain)
'from pang in arm?' is the wordplay.
'from' indicates a hidden word.
'ANGINA' is hidden in the letters of 'pang in arm'.
(Other definitions for angina that I've seen before include "Sharp chest pain caused by heart disease" , "medical condition" , "Sudden cardiac pain" , "Cardiac complaint" , "heartfelt complaint?" .)