Count left the edition confused (6)
I believe the answer is:
addled
'confused' is the definition.
(addling is a kind of confusing)
'count left the edition' is the wordplay.
'count' becomes 'add' (adding is a kind of counting).
'left' becomes 'l' (common abbreviation).
'the edition' becomes 'ed'.
'add'+'l'+'ed'='ADDLED'
(Other definitions for addled that I've seen before include "Baffled - rotten" , "Confused and vague" , "Corrupt" , "(Of an egg) went bad" , "Confused, mixed up like bad egg" .)