Clean weapon (5)
I believe the answer is:
lance
'weapon' is the definition.
(I know that lance is a type of weapon)
'clean' is the wordplay.
'clean' anagrams to 'LANCE'.
However, I am not clear how the anagram is indicated.
Can you help me to learn more?
(Other definitions for lance that I've seen before include "Chap" , "Pierce (a boil)" , "Horseman's long weapon" , "Surgical knife" , "Knightly weapon" .)