Team's weapon supply (7)
I believe the answer is:
arsenal
This clue might be a double definition.
'team's' is the first definition.
(Arsenal football club)
'weapon supply' is the second definition.
'arsenal' can be an answer for 'supply' (I have seen 'Supply of weapons' mean 'arsenal' so perhaps 'supply' could also mean 'arsenal'). I'm not sure about the 'weapon' bit.
Can you help me to learn more?
(Other definitions for arsenal that I've seen before include "A military store of guns and armaments" , "weapons are kept here" , "London FC" , "Munitions store and English football team" , "Ammunition store or English soccer team" .)