A page from the top (4)

I believe the answer is:

apex

'the top' is the definition.
(thesaurus)

'a page from' is the wordplay.
'page' becomes 'p'.
'from' becomes 'ex'.
'a'+'p'+'ex'='APEX'

(Other definitions for apex that I've seen before include "Pointed top" , "Acme" , "The highest point of something" , "Top, peak" , "white collar union" .)

I've seen this clue in The Telegraph.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.