Britney's weapons? (6)
I believe the answer is:
spears
'weapons?' is the definition.
(spear is a kind of weapon)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for spears that I've seen before include "Javelins" , "Bits of green veg" , "Stems of asparagus as weapons" , "Asparagus shoots" , "pop singer" .)