Weapon point is made of lead (9)
I believe the answer is:
spearhead
'lead' is the definition.
(I know this)
'weapon point is' is the wordplay.
I cannot quite see how this works, but
'weapon' could be 'spear' (spear is a kind of weapon) and 'spear' is found in the answer.
'point' could be 'head' (synonyms) and 'head' is present in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'made of' is the link.
Can you help me to learn more?
(Other definitions for spearhead that I've seen before include "Take charge of" , "Lead (an attack or movement)" , "front" , "Group leading an attack" , "Leading force in a military attack" .)