What a bandolier holds (4)
I believe the answer is:
ammo
'what a bandolier holds' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ammo that I've seen before include "Slugs perhaps" , "Bullets etc.(informal)" , "Explosive devices" , "Bullets (sl.)" , "Bullets (abbrev.)" .)