Joined by a thread from all quarters (4)
I believe the answer is:
sewn
'joined by a thread' is the definition.
(sewn with thread)
'all quarters' is the wordplay.
'all' becomes 'se' (I can't explain this - if you can you should believe this answer much more).
'quarters' becomes 'wn'.
'se'+'wn'='SEWN'
'from' acts as a link.
Can you help me to learn more?
(Other definitions for sewn that I've seen before include "Needled" , "joined together" , "Run up" , "done with a needle" , "Fastened with needlework" .)