Thinking relations should not be featured in the article (5)
I believe the answer is:
thing
'article' is the definition.
(both can mean an object)
'thinking relations should not be featured in the' is the wordplay.
I cannot quite understand how this works, but
'in' is found in the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for thing that I've seen before include "cup of tea" , "An unnamed object or item" , "A creature" , "Individual object" , "Object; gadget" .)