Ordinary writer is generally accessible (4)
I believe the answer is:
open
'generally accessible' is the definition.
'open' can be an answer for 'accessible' (thesaurus). I'm not certain of the 'generally' bit.
'ordinary writer' is the wordplay.
'ordinary' becomes 'o' (abbreviation e.g. O-Levels).
'writer' becomes 'pen' (I've seen this before).
'o'+'pen'='OPEN'
'is' acts as a link.
Can you help me to learn more?
(Other definitions for open that I've seen before include "Unlock" , "Candid or unlocked" , "'Frank, not secret (4)'" , "Not closed or secret" , "Undo; exposed to attack" .)