Edges in wearing shoes -- careless! (8)
I believe the answer is:
slipshod
'careless' is the definition.
('slipshod' can be similar in meaning to 'careless')
'edges in wearing shoes' is the wordplay.
'edges' becomes 'lips' (lip is a kind of edge).
'in' is an insertion indicator.
'wearing shoes' becomes 'shod' (I've seen this before).
'lips' put within 'shod' is 'SLIPSHOD'.
(Other definitions for slipshod that I've seen before include "Loose" , "Careless, slovenly" , "Carelessly done" , "Sloppy, careless" , "Carelessly executed" .)