Very busy Cockney without work is in the wrong place (7)
I believe the answer is:
ectopic
'in the wrong place' is the definition.
(as in ectopic pregnancy)
'very busy cockney without work' is the wordplay.
'very busy cockney' becomes ''ectic' ('hectic' - I've seen this before - said with the 'H' dropped - a cockney accent.).
'without' is an insertion indicator ('without' can be similar in meaning to 'outside').
'work' becomes 'op' (abbreviation for opus).
'ectic' going around 'op' is 'ECTOPIC'.
'is' is the link.
(Other definitions for ectopic that I've seen before include "In an abnormal position" , "unusual pregnancy" , "out of place" , "In an unusual situation" .)