Weapon point caught in material (5)
I believe the answer is:
lance
'weapon' is the definition.
(I know that lance is a type of weapon)
'point caught in material' is the wordplay.
'point' becomes 'N' (N is an example).
'caught in' is an insertion indicator.
'material' becomes 'lace' (lace is a kind of material).
'n' inserted inside 'lace' is 'LANCE'.
(Other definitions for lance that I've seen before include "Spear for a horse-soldier" , "Long, pointed weapon (5)." , "Long-shafted weapon" , "Clean (anag) -- weapon" , "Spear carried by mounted soldier" .)