One prays to see article on page (7)
I believe the answer is:
pleader
'one' is the definition.
Both the definition and answer are singular nouns.
Perhaps there's a link between them I don't understand?
'prays to see article on page' is the wordplay.
I cannot quite see how this works, but
'article' could be 'lead' (lead is a kind of article) and 'lead' is located in the answer.
'page' could be 'p' and 'p' is located in the answer.
The remaining letters 'er' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for pleader that I've seen before include "one making earnest entreaty" , "Pale red (anag.)" , "case is made by one" , "Advocate" , "Person making case" .)