As used for writing home at Eton, perhaps (7)
I believe the answer is:
notepad
'as used for' is the definition.
The definition suggests a singular noun which matches the answer.
'home at eton perhaps' is the wordplay.
'home' becomes 'pad' (pad can mean a person's home).
'at' says to put letters next to each other (I've seen this in other clues).
'perhaps' is an anagram indicator.
'eton' with letters rearranged gives 'note'.
'pad' after 'note' is 'NOTEPAD'.
'writing' is the link.
Can you help me to learn more?
(Other definitions for notepad that I've seen before include "Block writer might have" , "Pocket-sized computer" , "A secretary may have one" , "scribbler" , "Item to write on" .)