Element of military training an option for doctor? (7,8)
I believe the answer is:
private practice
'an option for doctor?' is the definition.
(a doctor might have a private practice)
'element of military training' is the wordplay.
'element of military' becomes 'private' (I can't explain this - if you can you should believe this answer much more).
'training' becomes 'practice' (practice is a kind of training).
'private'+'practice'='PRIVATE PRACTICE'
(Other definitions for private practice that I've seen before include "Basic army training" , "professionally lucrative?" , "no NHS concern" .)