It's on top of page describing soccer technique (6)
I believe the answer is:
header
'soccer technique' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
'it's on top of page' is the wordplay.
'it's on' says to put letters next to each other.
'top' becomes 'head' (head is a kind of top).
'of page' becomes 'er' (I can't explain this - if you can you should believe this answer much more).
'head'+'er' is 'HEADER'.
'describing' acts as a link.
Can you help me to learn more?
(Other definitions for header that I've seen before include "A soccer pass; a laid brick" , "Strike of a football" , "One way to get a goal in football" , "Adhere (anag) - part of an email" , "Type of dive" .)