Read erratically, following quiet joint (6)
I believe the answer is:
shared
'joint' is the definition.
('shared' is associated in meaning with 'joint')
'read erratically following quiet' is the wordplay.
'erratically' indicates anagramming the letters.
'following' says to put letters next to each other.
'quiet' becomes 'sh'.
'read' is an anagram of 'ared'.
'ared' put after 'sh' is 'SHARED'.
(Other definitions for shared that I've seen before include "divided into portions" , "Communal" , "Cut" , "Went halves" , "Apportioned" .)