Law about piercing instrument (3)
I believe the answer is:
awl
'piercing instrument' is the definition.
'awl' can be an answer for 'instrument' (I have seen 'Pointed instrument ' mean 'awl' so perhaps 'instrument' could also mean 'awl'). I'm not sure about the 'piercing' bit.
'law about' is the wordplay.
'about' is an anagram indicator.
'law' with letters rearranged gives 'AWL'.
Can you help me to learn more?
(Other definitions for awl that I've seen before include "has its use at last" , "Hole-piercing tool" , "Hole-making tool" , "Pointed tool used in leatherwork" , "Hole-boring tool" .)