Vulgar wife escorted outside (4)
I believe the answer is:
lewd
'vulgar' is the definition.
(thesaurus)
'wife escorted outside' is the wordplay.
'wife' becomes 'w'.
'escorted' becomes 'led'.
'outside' means one lot of letters goes inside another.
'w' placed into 'led' is 'LEWD'.
(Other definitions for lewd that I've seen before include "Weld in lascivious way" , "Obscene - lustful - sensual" , "Salacious" , "Licentious or obscene" , "Crude, offensive" .)