Coarse wife guided outside (4)
I believe the answer is:
lewd
'coarse' is the definition.
(I've seen this in another clue)
'wife guided outside' is the wordplay.
'wife' becomes 'w' (abbreviation).
'guided' becomes 'led' ('lead' can be a synonym of 'guide').
'outside' means one lot of letters goes inside another (some letters go outside others).
'w' put into 'led' is 'LEWD'.
(Other definitions for lewd that I've seen before include "Sexually crude" , "Weld in lascivious way" , "Crude, offensive" , "suggestive manner" , "Salacious" .)