After morning, doctor makes cartridges, perhaps (4)
I believe the answer is:
'cartridges perhaps' is the definition.
I can't judge whether this defines the answer.
'after morning doctor' is the wordplay.
'after' means one lot of letters go next to another.
'morning' becomes 'am'.
'doctor' becomes 'mo' (medical officer).
'am' next to 'mo' is 'AMMO'.
'makes' is the link.
Can you help me to learn more?
(Other definitions for ammo that I've seen before include "Bullets, etc. (colloq.)" , "rounds briefly" , "What's fired from guns (abbr)" , "Explosive devices" , "Bullets, shells (colloq.)" .)