Where you might fabricate truth, or the end of reality (7)
I believe the answer is:
factory
'where you might fabricate' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'truth or the end of reality' is the wordplay.
'truth' becomes 'fact' (I've seen this before).
'the end of' suggests the final letters.
The last letter of 'reality' is 'y'.
'fact'+'or'+'y'='FACTORY'
Can you help me to learn more?
(Other definitions for factory that I've seen before include "Works" , "Building used for making or assembling items" , "Place for production" , "mill" , "Manufacturing plant" .)