As used in writing a pointed article? (3)
I believe the answer is:
pen
This clue could be a double definition.
'as' is the first definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'writing a pointed article?' is the second definition.
'pen' can be an answer for 'writing' (thesaurus). I am unsure of the 'a pointed article?' bit.
'used in' is the link.
Can you help me to learn more?
(Other definitions for pen that I've seen before include "Writing tool" , "Prison" , "International Association of poets, playwrights etc" , "Put down" , "Swan for the writer" .)