Young man joins plot to make this type of weapon (6)
I believe the answer is:
bladed
'make this type of weapon' is the definition.
The answer and definition are not the same part of speech.
'young man joins plot' is the wordplay.
'young man' becomes 'lad' (lad can mean a boy or young man).
'joins' is an insertion indicator (inserted letters join the word).
'plot' becomes 'bed' (a plot of land).
'lad' inserted within 'bed' is 'BLADED'.
'to' acts as a link.
Can you help me to learn more?
(Another definition for bladed that I've seen is " Like oars".)