Slide, wearing shoes, being careless? (8)
I believe the answer is:
slipshod
'careless?' is the definition.
('slipshod' can be similar in meaning to 'careless')
'slide wearing shoes' is the wordplay.
'slide' becomes 'slip' ('slip' can be a synonym of 'slide').
'wearing shoes' becomes 'shod' (I've seen this before).
'slip'+'shod'='SLIPSHOD'
'being' is the link.
(Other definitions for slipshod that I've seen before include "Haphazard, slapdash" , "Careless, slovenly" , "Sloppy and haphazard" , "Careless and slapdash, bad work" , "Carelessly executed" .)