Disconnected a French editor packing punch (8)

'disconnected' is the definition.
(hooked means linked up)

'a french editor packing punch' is the wordplay.
'a french' becomes 'un' ('a' in French).
'editor' becomes 'ed' (abbreviation).
'packing' is an insertion indicator (some letters are packed inside).
'punch' becomes 'hook' (type of punch in boxing).
'un'+'ed'='uned'
'uned' placed around 'hook' is 'UNHOOKED'.